Steel Reef On-The-Fly Links are 100% bespoke — individually engineered for your exact Rolex model, not “one size fits most.” Select the right model from the dropdown and we guarantee an indistinguishable fit, finish, and feel. No compromise. Ever.
Steel Reef On-The-Fly Links are 100% bespoke — individually engineered for your exact Tudor model, not “one size fits most.” Select the right model from the dropdown and we guarantee an indistinguishable fit, finish, and feel. No compromise. Ever.
Steel Reef On-The-Fly Links are 100% bespoke — individually engineered for your exact Zenith model, not “one size fits most.” Select the right model from the dropdown and we guarantee an indistinguishable fit, finish, and feel. No compromise. Ever.
Steel Reef On-The-Fly Links are 100% bespoke — individually engineered for your exact Sinn model, not “one size fits most.” Select the right model from the dropdown and we guarantee an indistinguishable fit, finish, and feel. No compromise. Ever.
Steel Reef On-The-Fly Links are 100% bespoke — individually engineered for your exact Longines model, not “one size fits most.” Select the right model from the dropdown and we guarantee an indistinguishable fit, finish, and feel. No compromise. Ever.
Steel Reef On-The-Fly Links are 100% bespoke — individually engineered for your exact Seiko model, not “one size fits most.” Select the right model from the dropdown and we guarantee an indistinguishable fit, finish, and feel. No compromise. Ever.
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MODEL
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
For Collectors Who Refuse to Compromise on Comfort
If you’ve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet can’t keep up — until now.
Instant, tool-free ±5 mm adjustment completely hidden under your clasp — you’ll never see it, and neither will anyone else, except they’ll notice your watch always sits perfectly.
Installs quickly with a screwdriver – fully reversible, no trace.
Built from the same 904L/316L stainless steel grades your Rolex uses, then machined to ±0.02 mm tolerances so it disappears into your bracelet.
This is a precision upgrade trusted by serious Rolex enthusiasts worldwide — a detail you’ll notice every time you put your watch on.
MODEL
Pre-Order for January Delivery
This is one of our most anticipated and best-selling products. We are currently highly oversubscribed, but pre-orders are now open for the next small bespoke run.
Each run is produced in limited quantities, and all funds go directly into manufacturing.
Shipping is expected January 2026. This is a pre-order for a small bespoke batch.Orders are non-refundable.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Tudor, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
MODEL
PRE-ORDER NOTICE:
We’ve received unprecedented demand for Zenith On The Fly Links. A second batch of 50 units is now in production, with estimated shipping in January 2026. Timelines may run over slightly depending on final QC. Pre-orders are final, so please only purchase if you intend to keep your watch.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Zenith, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
PRE-ORDER NOTICE:
We’ve received unprecedented demand for Zenith On The Fly Links. A second batch of 50 units is now in production, with estimated shipping in January 2026. Timelines may run over slightly depending on final QC. Pre-orders are final, so please only purchase if you intend to keep your watch.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Zenith, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
PRE-ORDER NOTICE:
We’ve received unprecedented demand for Zenith On The Fly Links. A second batch of 50 units is now in production, with estimated shipping in January 2026. Timelines may run over slightly depending on final QC. Pre-orders are final, so please only purchase if you intend to keep your watch.
YOUR BRACELET IS NEVER THE PERFECT FIT
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Zenith, with a flawless aesthetic match.
Easy 1-Minute Install – All you need is a screwdriver, install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
The Longines Zulu Time is easily one of the brand’s best releases in years — but it should have shipped with this feature. Add it, and it’s perfect.
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Longines, with a flawless aesthetic match.
Easy 1-Minute Install – Use the supplied friction pin and a pin pusher tool; install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
Compatible Models:
Zulu Time 39mm L3.802.4.53.6
Zulu Time 39mm L3.802.4.63.6
Zulu Time 39mm L3.802.4.93.6
Zulu Time 39mm L3.802.5.53.6
Spirit Pilot 3 Hands 39mm L3.809.4.53.6
Spirit Pilot Flyback 39.50mm L3.721.4.53.6
Pre-Order: On The Fly Extension Link – Longines Zulu Time 42mm
This is a pre-order for a small bespoke run of 50 units. Orders are non-refundable. Funds go directly into manufacturing, and shipping is expected January 2026
The Longines Zulu Time is easily one of the brand’s best releases in years — but it should have shipped with this feature. Add it, and it’s perfect.
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same 316L stainless steel grade as Longines, with a flawless aesthetic match.
Easy 1-Minute Install – Use the supplied friction pin and a pin pusher tool; install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
Compatible Models
L3.812.4.53.6
L3.812.4.63.6
L3.812.4.93.6
L3.812.5.53.6
L3.812.4.60.6
L3.812.4.50.6
Pre-Order Terms (Must Read)
Shipping Timeline (Estimate): Expected January 2026. This is an estimated timeline and may overrun depending on production or logistics factors.
Non-Refundable: All orders are final; cancellations or refunds cannot be accepted.
Limited Run: Only 50 units worldwide.
Direct to Manufacturing: Your purchase directly funds production of this exclusive batch.
MODEL
SwiftLink™ - The World’s First Invisible Micro-Adjustable Link
The first batch sold out in minutes, pre-ordered by early supporters in Spring 2025.Thank you to everyone who secured a place — your support has made this project possible.
Protected by two patents, SwiftLink has become one of the most sought-after watch innovations ever.
Unlike folding clasps with space beneath them, integrated clasps — like those on Grand Seiko — leave no room for a mechanism. So we engineered the entire micro-adjustment system inside the bracelet link itself.
We’re now finalising the design and preparing for manufacturing. Batch Two is planned for mid–late 2026. Select “Register Interest” to reserve a place — if a unit becomes available sooner, we’ll contact you directly.
Sinn makes some of the toughest, most capable tool watches in the world — but even they missed this. Add it, and it’s perfect.
Morning: perfect. Afternoon: too tight. Evening: too loose. Heat, cold, and movement change your wrist — your bracelet can’t keep up.
On The Fly fixes that with instant, tool-free ±5 mm adjustment, completely hidden under your clasp. You’ll never see it, and neither will anyone else — except they’ll notice your watch always sits perfectly.
Always Perfect – Comfort on demand, in seconds.
Invisible Upgrade – Discreetly tucked under the clasp, preserving your watch’s original look.
Luxury Craftsmanship – Same high-grade stainless steel as Sinn, with a flawless aesthetic match.
Easy 1-Minute Install – Uses your existing screw and hex key; install once and adjust forever.
Reversible – Install once, remove anytime, no trace.
Once you try it, every other bracelet will feel wrong.
Model Number
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
1016 / Polished Sides / 904L Steel
1016 / Polished Sides / 316L Steel
1016 / Brushed Sides / 316L Steel
114270 / Polished Sides / 904L Steel
114270 / Polished Sides / 316L Steel
124273 / Polished Sides / Two Tone
14270 / Polished Sides / 904L Steel
14270 / Polished Sides / 316L Steel
14270 / Brushed Sides / 316L Steel
5500 / Polished Sides / 904L Steel
5500 / Polished Sides / 316L Steel
5500 / Brushed Sides / 316L Steel
214270 / Polished Sides / 904L Steel
214270 / Polished Sides / 316L Steel
Model Number
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
1655 / 904L Steel
1655 / 316L Steel
16570 / 904L Steel
16570 / 316L Steel
16550 / 904L Steel
16550 / 316L Steel
216570 / 904L Steel
216570 / 316L Steel
Model Number
Bracelet Type
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
16753 / Oyster / Two Tone
16753 / Jubilee / Two Tone
16700 / Oyster / 904L Steel
16700 / Oyster / 316L Steel
16700 / Jubilee / 904L Steel
16700 / Jubilee / 316L Steel
16750 / Oyster / 904L Steel
16750 / Oyster / 316L Steel
16750 / Jubilee / 904L Steel
16750 / Jubilee / 316L Steel
16710 / Oyster / 904L Steel
16710 / Oyster / 316L Steel
16710 / Jubilee / 904L Steel
16710 / Jubilee / 316L Steel
16713 / Oyster / Two Tone
16713 / Jubilee / Two Tone
16760 / Oyster / 904L Steel
16760 / Oyster / 316L Steel
16760 / Jubilee / 904L Steel
16760 / Jubilee / 316L Steel
Model Number
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
114300 / 904L Steel
114300 / 316L Steel
Model Number
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
116000 / 904L Steel
116000 / 316L Steel
116034 / 904L Steel
116034 / 316L Steel
126000 / 904L Steel
126000 / 316L Steel
Model Number
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
14060 / Polished Sides / 904L Steel
14060 / Polished Sides / 316L Steel
14060 / Brushed sides / 316L Steel
14060M / Polished Sides / 904L Steel
14060M / Polished Sides / 316L Steel
14060M / Brushed sides / 316L Steel
16610 / Polished Sides / 904L Steel
16610 / Polished Sides / 316L Steel
16610 / Brushed sides / 316L Steel
16613 / Polished Sides / Two Tone
1680 / Polished Sides / 904L Steel
1680 / Polished Sides / 316L Steel
1680 / Brushed sides / 316L Steel
16800 / Polished Sides / 904L Steel
16800 / Polished Sides / 316L Steel
16800 / Brushed sides / 316L Steel
168000 / Polished Sides / 904L Steel
168000 / Polished Sides / 316L Steel
168000 / Brushed sides / 316L Steel
5513 / Polished Sides / 904L Steel
5513 / Polished Sides / 316L Steel
5513 / Brushed sides / 316L Steel
5512 / Polished Sides / 904L Steel
5512 / Polished Sides / 316L Steel
5512 / Brushed sides / 316L Steel
16803 / Polished Sides / Two Tone
Model Number
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
16600 / Polished sides / 904L Steel
16600 / Polished sides / 316L Steel
16600 / Brushed sides / 316L Steel
16660 / Polished sides / 904L Steel
16660 / Polished sides / 316L Steel
16660 / Brushed sides / 316L Steel
1665 / Polished sides / 904L Steel
1665 / Polished sides / 316L Steel
1665 / Brushed sides / 316L Steel
Model Number
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
1675 / Oyster / 904L Steel
1675 / Oyster / 316L Steel
1675 / Jubilee / 904L Steel
16700 / Oyster / 904L Steel
16700 / Oyster / 316L Steel
16700 / Jubilee / 904L Steel
16750 / Oyster / 904L Steel
16750 / Oyster / 316L Steel
16750 / Jubilee / 904L Steel
16753 / Oyster / Two Tone
16753 / Jubilee / Two Tone
Model Number
Bracelet & Steel Grade
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
116200 / Oyster 904L Steel / Polished Center Link
116200 / Oyster 316L Steel / Polished Center Link
116203 / Oyster Two Tone Yellow Gold / Polished Center Link
116233 / Oyster Two-Tone / Polished Center Link
116234 / Oyster 904L Steel / Polished Center Link
116234 / Oyster 316L Steel / Polished Center Link
116261 / Oyster 904L Steel / Polished Center Link
116261 / Oyster 316L Steel / Polished Center Link
116264 / Oyster 904L Steel / Polished Center Link
116264 / Oyster 316L Steel / Polished Center Link
116264 / Jubilee 904L Steel / Polished Center Link
126201 / Oyster 904L Steel / Polished Center Link
126201 / Oyster 316L Steel / Polished Center Link
126201 / Jubilee 904L Steel / Polished Center Link
126231 / Oyster 904L Steel / Polished Center Link
126231 / Oyster 316L Steel / Polished Center Link
126231 / Jubilee 904L Steel / Polished Center Link
16030 / Oyster 904L Steel / Polished Center Link
16030 / Oyster 904L Steel / Brushed Center Link
16030 / Oyster 316L Steel / Polished Center Link
16030 / Oyster 316L Steel / Brushed Center Link
16030 / Jubilee 904L Steel / Polished Center Link
16203 / Oyster Two-Tone / Polished Center Link
16203 / Jubilee Two-Tone / Polished Center Link
16223 / Oyster Two-Tone / Polished Center Link
16223 / Jubilee Two-Tone / Polished Center Link
16220 / Oyster 904L Steel / Polished Center Link
16220 / Oyster 904L Steel / Brushed Center Link
16220 / Oyster 316L Steel / Polished Center Link
16220 / Oyster 316L Steel / Brushed Center Link
16220 / Jubilee 904L Steel / Polished Center Link
116201 / Oyster 904L Steel / Polished Center Link
116201 / Oyster 904L Steel / Brushed Center Link
116201 / Oyster 316L Steel / Polished Center Link
116201 / Oyster 316L Steel / Brushed Center Link
116231 / Oyster 904L Steel / Polished Center Link
116231 / Oyster 904L Steel / Brushed Center Link
116231 / Oyster 316L Steel / Polished Center Link
116231 / Oyster 316L Steel / Brushed Center Link
116244 / Oyster 904L Steel / Polished Center Link
116244 / Oyster 904L Steel / Brushed Center Link
116244 / Oyster 316L Steel / Polished Center Link
116244 / Oyster 316L Steel / Brushed Center Link
116263 / Oyster Two-Tone / Polished Center Link
116300 / Oyster 904L Steel / Polished Center Link
116300 / Oyster 904L Steel / Brushed Center Link
116300 / Oyster 316L Steel / Polished Center Link
116300 / Oyster 316L Steel / Brushed Center Link
116300 / Jubilee 904L Steel / Polished Center Link
126200 / Oyster 904L Steel / Polished Center Link
126200 / Oyster 904L Steel / Brushed Center Link
126200 / Oyster 316L Steel / Polished Center Link
126200 / Oyster 316L Steel / Brushed Center Link
126200 / Jubilee 904L Steel / Polished Center Link
126203 / Oyster Two-Tone / Polished Center Link
126203 / Jubilee Two-Tone / Polished Center Link
126233 / Oyster Two-Tone / Polished Center Link
126233 / Jubilee Two-Tone / Polished Center Link
16264 / Oyster 904L Steel / Polished Center Link
16264 / Oyster 904L Steel / Brushed Center Link
16264 / Oyster 316L Steel / Polished Center Link
16264 / Oyster 316L Steel / Brushed Center Link
16264 / Jubilee 904L Steel / Polished Center Link
1603 / Oyster 904L Steel / Polished Center Link
1603 / Oyster 904L Steel / Brushed Center Link
16234 / Oyster 904L Steel / Polished Center Link
16234 / Oyster 904L Steel / Brushed Center Link
16234 / Oyster 316L Steel / Polished Center Link
16234 / Oyster 316L Steel / Brushed Center Link
16234 / Jubilee 904L Steel / Polished Center Link
Model Number
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
67480 / Polished sides
67514 / Polished sides
6751 / Polished sides
77014 / Polished sides
77080 / Polished sides
67483 / Polished sides
67513 / Polished sides
67480 / Brushed sides
67514 / Brushed sides
6751 / Brushed sides
77014 / Brushed sides
77080 / Brushed sides
67483 / Brushed sides
67513 / Brushed sides
Model Number
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
68240 / Brushed Center Link / 904L Steel
68243 / Polished Center Link / 904L Steel
68243 / Polished Center Link / 316L Steel
68273 / Polished Center Link / 904L Steel
68273 / Polished Center Link / 316L Steel
68274 / Brushed Center Link / 904L Steel
68274 / Brushed Center Link / 316L Steel
68274 / Polished Center Link / 904L Steel
68274 / Polished Center Link / 316L Steel
178240 / Brushed Center Link / 904L Steel
78274 / Brushed Center Link / 904L Steel
78240 / Brushed Center Link / 904L Steel
Model Number
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
268621 / 904L Steel
268621 / 316L Steel
268622 / 904L Steel
268622 / 316L Steel
116621 / 904L Steel
116621 / 316L Steel
126621 / 904L Steel
126621 / 316L Steel
16622 / 904L Steel
16622 / 316L Steel
116622 / 904L Steel
116622 / 316L Steel
126622 / 904L Steel
126622 / 316L Steel
16623 / Two Tone
Model Number
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
124300 / 904L Steel
124300 / 316L Steel
Model Number
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
116400 / 904L Steel
116400 / 316L Steel
116400GV / 904L Steel
116400GV / 316L Steel
Model Number
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
116500LN / 904L Steel
116500LN / 316L Steel
116520 / 904L Steel
116520 / 316L Steel
126500LN / 904L Steel
126500LN / 316L Steel
116523 / Two Tone
126503 / Two Tone
16523 / Two Tone
116503 / Two Tone
6263 / 904L Steel
6265 / 904L Steel
16520 / 904L Steel
16520 / 316L Steel
Model Number
Bracelet
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
126200 / Oyster / 904L Steel
126200 / Oyster / 316L Steel
126200 / Jubilee / 904L Steel
126203 / Oyster / 316L Steel
126203 / Jubilee / Two Tone
126233 / Oyster / Two Tone
126233 / Jubilee / Two Tone
126234 / Oyster / 904L Steel
126234 / Oyster / 316L Steel
126234 / Jubilee / 904L Steel
126300 / Oyster / 904L Steel
126300 / Oyster / 316L Steel
126300 / Jubilee / 904L Steel
126301 / Oyster / 904L Steel
126301 / Oyster / 316L Steel
126301 / Jubilee / 904L Steel
126301 / Jubilee / 316L Steel
126303 / Oyster / Two Tone
126303 / Jubilee / Two Tone
126331 / Oyster / 904L Steel
126331 / Oyster / 316L Steel
126331 / Jubilee / 904L Steel
126331 / Jubilee / 316L Steel
126333 / Oyster / Two Tone
126333 / Jubilee / Two Tone
126334 / Oyster / 904L Steel
126334 / Oyster / 316L Steel
126334 / Jubilee / 904L Steel
278274 / Oyster / 904L Steel
278274 / Oyster / 316L Steel
278274 / Jubilee / 904L Steel
116300 / Oyster / 904L Steel
116300 / Oyster / 316L Steel
116300 / Jubilee / 904L Steel
116333 / Oyster / Two Tone
116333 / Jubilee / Two Tone
116334 / Oyster / 904L Steel
116334 / Oyster / 316L Steel
116334 / Jubilee / 904L Steel
Title
Default Title
Model Number
79830
79833
Model Number
79500
Model Number
79360
79350
Model Number
79230
79540
Model
79230G
Model Number
79220
Model Number
79540
79230
Model Number
70330
Model Number
79730
Model Number
Steel Grade
316L VS 904L STAINLESS STEEL
Rolex uses 904L stainless steel for its bracelets, so if you want your On The Fly Extension Link to perfectly match your OEM bracelet, choose 904L. However, 316L stainless steel - used by brands like Omega and Tudor - is virtually identical in appearance and performance.
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
79190 / 904L Steel (Premium OEM) / Polished Sides
79190 / 904L Steel (Premium OEM) / Brushed Sides
79190 / 316L Steel / Polished Sides
79190 / 316L Steel / Brushed Sides
79090 / 904L Steel (Premium OEM) / Polished Sides
79090 / 904L Steel (Premium OEM) / Brushed Sides
79090 / 316L Steel / Polished Sides
79090 / 316L Steel / Brushed Sides
75090 / 904L Steel (Premium OEM) / Polished Sides
75090 / 904L Steel (Premium OEM) / Brushed Sides
75090 / 316L Steel / Polished Sides
75090 / 316L Steel / Brushed Sides
75190 / 904L Steel (Premium OEM) / Polished Sides
75190 / 904L Steel (Premium OEM) / Brushed Sides
75190 / 316L Steel / Polished Sides
75190 / 316L Steel / Brushed Sides
Model Number
79350
Model Number
79910
Model Number
79620
Model Number
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
79260 / Polished Sides
79260 / Brushed Sides
79270 / Polished Sides
79270 / Brushed Sides
79280 / Polished Sides
79280 / Brushed Sides
Model Number
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
79160 / Polished Sides
79160 / Brushed Sides
79179 / Polished Sides
79179 / Brushed Sides
79180 / Polished Sides
79180 / Brushed Sides
Title
Default Title
Title
Default Title
Title
Default Title
Model
Spirit Zulu Time 39mm
Model
Spirit Zulu Time 42mm (Pre-Order for January)
Material
Finish
POLISHED VS BRUSHED FINISH
When choosing between polished or brushed sides, match the finish of your existing bracelet. If you’re unsure, just glance at the outer edge of your bracelet links - if they reflect light like a mirror, go polished; if they have a satin texture, go brushed.
Link Assembly
Titanium / Polished Accents / Screws & Pin
Titanium / Polished Accents / Pin & Collar
Titanium / Brushed Accents / Screws & Pin
Titanium / Brushed Accents / Pin & Collar
Titanium / No Accents / Screws & Pin
Titanium / No Accents / Pin & Collar
Stainless Steel / Polished Accents / Screws & Pin
Stainless Steel / Polished Accents / Pin & Collar
Stainless Steel / Brushed Accents / Screws & Pin
Stainless Steel / Brushed Accents / Pin & Collar
Stainless Steel / No Accents / Screws & Pin
Stainless Steel / No Accents / Pin & Collar
Model
Sinn 103
Sinn 104
Sinn 556
Sinn EZM 3 (not bead-blasted finish, but compatible)
IN STOCK, READY TO SHIP
Installs exactly like a factory link - no modification, no damage, fully reversible.
Done in under two minutes with a 1.6 mm flat-blade screwdriver.
We don’t make “universal” links. Every Steel Reef component is individually designed for a specific reference and cut from the same grade of steel your watch is made from.
Machined to ±0.02 mm, our links match OEM-inspired tolerances and finish so precisely that they disappear into your bracelet - the only difference is the improved comfort and balance.
This level of precision takes time, expertise, and cost to achieve, which is exactly why serious collectors choose Steel Reef.
Every Steel Reef component is precisely engineered and thoroughly inspected.
In the rare event of a manufacturing fault or a genuine fit issue, we’ll take care of it with a replacement.
We are not affiliated, associated, endorsed by, or in any way officially connected with any watch brands.
Our parts are aftermarket accessories, designed with quality and precision.
See 'On The Fly' in action and learn about the installation process, courtesy of Adrian Barker
WHY 'ON THE FLY'?
Most watches force you to live with a fit that’s never quite right. Hot days, long days, “bad wrist days” - you just put up with it.
'On The Fly' changes that. This OEM-inspired upgrade adds tool-free, instant adjustability so you can perfect your fit anytime, anywhere - without losing an ounce of durability or elegance.
THE ONLY DIFFERENCE YOU’LL NOTICE IS THE EXTRA COMFORT
Precision-engineered and crafted from aerospace-grade 904L and 316L stainless steel, 'On The Fly' matches - and often exceeds - the material quality, finish, and tolerances of the world’s most prestigious watch brands.
Genuine voices - Honest experience
WHAT OUR CUSTOMERS SAY
5/5
Fits & feels OEM - I don’t even notice it’s there. Honestly, you can’t tell it’s aftermarket.
Darryl W.
Austin, USA
5/5
It takes a second to adjust and makes wearing my watch all day so much more comfortable. It’s subtle, solid, and looks completely factory.
Mark K.
London, UK
5/5
Material, machining, click-action all spot on to OEM levels. The investment has been worth it.
Matteo T.
Zurich, Switzerland
5/5
Got the extension link for my Submariner and fitted it in under 5 minutes. The click-in adjustment gives me exactly what I was missing
Alex G.
Singapore
Our Values
5,000+ Customers worldwide
Trusted by collectors across every continent. Owners who value authenticity choose Steel Reef. Proven upgrades, worn daily on thousands of wrists.
PRECISION MANUFACTURING
Cut, finished, and tolerance-tested. Every edge, curve, and click meets our rigorous spec. Precision isn’t a claim - it’s our process.
WORLDWIDE SHIPPING
Secure, insured delivery to your door. No compromises, no uncertainty, wherever you are. Engineered upgrades, shipped with confidence worldwide.
COMMUNITY LED RESEARCH
We build what collectors ask for. Your insights shape our engineering roadmap. Every release solves a real wrist-level challenge.
FREQUENTLY ASKED QUESTIONS
We offer free economy shipping and paid express options to almost every country worldwide.
UK Orders: Delivered within 2 working days.
International Orders: Typically delivered within 5–7 working days. Delivery times may vary slightly based on your location and local customs.
If a product is out of stock or yet to be launched, you’ll often see an option to pre-order or register your interest directly on the product page.
Pre-orders guarantee your unit in the next production run, while registering your interest ensures you’ll be notified as soon as it becomes available.
We want every customer to feel confident in their purchase, so we accept returns when appropriate. To keep things fair and transparent, here’s how our process works.
Return Eligibility: Returns are only accepted within 7 days of delivery and only for items that are unopened, unused, and in their original condition. Once a product has been opened, installed, or handled beyond the external packaging, it is considered used and no longer eligible for return unless it is faulty. This follows the same principle as a luxury watch: once seals or protective films are removed, the item is no longer classed as new. If you’re unsure whether your order qualifies, just reach out and we’ll confirm.
Return Shipping Costs: If a return is approved, return shipping is the responsibility of the customer. Original shipping fees are non-refundable.
Refunds: Once the item is received and inspected, we’ll issue a refund for the product price (minus any shipping/import costs).
Defective Items: If you receive a defective or incorrect item - rare, but possible - we’ll cover all return shipping costs and resolve it quickly with a replacement or refund.
How to Start a Return: Contact us with your order number and the reason for your request. Our team will review your case and provide the next steps.
We aim to keep the process clear, consistent, and straightforward. If you need help or have any questions, our support team is here to assist.
Choosing a selection results in a full page refresh.
DarrylW
Fits and Looks OEM!
The on-the-fly link is the perfect accessory to my vintage “meters first” 5513. The bracelet now fits perfectly in warm or cold weather. Before, it had to be compromise-adjusted to be too loose for warm and a bit tight for cold. The link material and finish match perfectly also, and indistinguishable from OEM.
Submariner "On the Fly" Extension Link
Jason T.
Fits perfectly
The extension link was easy to install and fits my Tudor Heritage Chrono perfectly. No more tight fit. I will buy for some of my other watches.
“On The Fly” Extension Link - Micro Adjustment for Longines Spirit Models
Matt
Awesome as always! This is my third one!
Explorer “On the Fly” Extension Link
Tom
Finish and in all aspects identical to the rest of the bracelet.
