Smooth spring of carabiners make them to be quickly and securely attached items to pack, belt or handbag, etc. These carabiner hooks are made of superior durable lightweight aircraft aluminum alloy to make them more durable, stronger and lightweight. D Ring Carabiner clips are suitable for experienced backpackers, hikers and park rangers. You could use it to attach sports bottle, camping gear, hanging lanterns and lights, backpack, ropes of camping tent, hiking pole or as a keychain. Very durable and great for hiking, fishing, traveling, camping and even kayaking.