Linsoir Beads Strong Cylinder Bayonet Push Clasps Brass Cord Ends for 3mm Round Leather Cord Buckle Mating Connectors Gun Black Plated Pack of 20 Made in copper,gun black plated Hole Size: 3mm for 3mm round leather cord Have 20 pcs in a package Bayonet clasps in gold tone,buckle mating connectors,cord end tubes fit for 3mm cords.Great bracelet findings supplies for your DIY jewelry projects Brand goods from Linsoir Beads,nice quality and good service