This is a smart piece of steel, made so it can be added to a bracelet-clasp. When you attach it to your clasp, you add 4 holes for fitting the bracelet, and 1.7cm length. I deliver this extender with a push pin to attach it to your clasp.
When your clasp is 16mm wide, choose the 16mm extender, same with the 18 and 20mm extenders.
