Material: it is solid and high hardness,durable; Set of 10 different sizes from 10mm-28mm watch band screw pin ,completely and Conveniently; These friction pins are designed to fasten the watch band, help you change watch straps and watch buckles without damaging your watch secondly; It is your effective helper when you repair your watch straps or other watch accessories replacement you need; The necessary for watchmakers and watch enthusiast or people who want to repair his watch by himself; Type: Feature: Watch Strap Screws Item Type: Repair and Kits The thickness of the shaft: 1.3mm The thickness of the cap: 0.8mm Size: 10mm-28mm (length of shaft, no cap included) Color: Silver and gold Material: metal Package Contents: 1 * Box Watch Strap Screws Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.