Add precise, half-hole micro-adjustment to your favorite watch straps. The Fitwell® M1 Rose Gold replaces your existing pin buckle and doubles the number of usable fit positions, with a second “half-hole” position set 3mm from the first.

If you’ve ever found your watch slightly too tight in warm weather or too loose in the cold, the M1 solves it. No strap modification. Just a precision rose-gold-finished 316L stainless steel buckle engineered for daily comfort.

Features

• Compatible with most leather, rubber, or fabric straps
• Installs in place of your existing pin buckle, no modification needed
• Two fit positions 3mm apart, right between standard holes
• 316L Stainless buckle and tang with stainless-steel spring bar
• Includes one installed spring bar + one spare

Choosing Your Size

Your Fitwell® M1 size is based on the width of your strap at the buckle, not the lug width of your watch.

If your strap is straight (non-tapered):
Select the M1 size that matches your lug width.

If your strap tapers toward the buckle:
Measure the width of your strap at the buckle end, or the inside width of your current buckle, using a ruler, tape measure, or caliper.
Choose the M1 size that matches that measurement.

Most tapered straps narrow by 2 to 4 mm.

Examples:

• A 20mm strap (at the lugs) tapering to 16mm: choose a 16mm M1
• A 22mm strap (at the lugs) tapering to 18mm: choose an 18mm M1