Works for watch Bands between up to 15mm wide. If you trim the pin, you could use them for watches up to about 21mm in width. Pin is about 0.038 inch in diameter. The pins are delicate must be used with care. The pins have no warranty, but are replaceable. For best results, make sure the pin is aligned with the hole for the link pin, it is a smaller diameter than the hole and that the pins are not the screw in type. Replacement bars are part numbers D-AD14 and BDL55. Extra Replacement Pins are part numbers D-AD14 and BDL55.