This Fish Hook Key Ring Holder is perfect for keeping your keys organized and secure. Made of zinc alloy, it is durable and long-lasting. It comes with a jump ring of 10 mm and can accommodate 3mm (0.12") opening. The overall measurement is 2" x 5/8" (50 mm x 14 mm). This pack of 2 pieces is perfect for leathercraft accessories. Get this CRAFTMEMORE Japanese Fish Hook Keychain Wallet Holder Belt Clip Leathercraft Accessories 2" Long Pack of 2 (Gunmetal) and keep your keys safe and secure.