Outmate 6 pcs Aluminum D-Ring Locking Carabiner Light but Strong STRUCTURE IMPROVED. Designed for fast and convenient connections.Can be easily attached to belt loops,backpacks,and more.You can also use them to put up tents and connect cords. LIGHT,STRONG&RUST-FREE.Made of aero grade aluminum alloy with a polished finish,ultra light yet strong,and tough enough to resist water and abrasion. VERSATILE.The carabiners are perfect for various occasions,such as camping,fishing,hiking,traveling,keychain,backpack and a lot more. WARNING.Break limit for STATIC force is 150 pounds with nut screwed.Can only be used for hanging light weight stuff.NOT applicable for climbing,swing,hammock,punching bag,big dog leash and the like. 100% money-back GUARANTEE if you are not satisfied.No questions asked.Outmate is the owner of Outmate brand and the only distributor of Outmate branded products.We've authorized no third party to sell any Outmate branded products on Amazon.Beware of counterfeit. Length: 3.07(78mm) Width:1.57(40mm) Diameter: 0.28(7mm) Weight: 0.7ounce each 8-12 turns to fully lock/unlock Attaching water bottle to backpack Clipping keys to pants or pack Connecting rope and tent or hanging things at camp, etc.