Mini Skater Aluminum Fashion Durable Multi-Functional D-Ring Key Chain Clip Hook Steel Wire Cable Key Ring Keychain Connection Made from aluminum alloy. Size: 7.8cm*4.4cm*0.8cm/3.1 " * 1.75 " * 0.3" ( Length * Width * Diameter) Light-weight and easy to carry. Suitable for outdoor activity, fishing, traveling, etc. Pls note: Not recommended to be used in mountaineering, rock climbing, ice climbing and high-altitude games for your safety.