Lightweight but strong and practical. Easily hook your keys on the caribeaner, You don't have to worry about it will rust. Never Rust! D Ring Carabiner clips are suitable for outdoor hiking, fishing, camping, traveling. You could use it as a key chain clip. Use it to attach sports bottle, backpack, ropes of camping tent, hiking pole, small travel EDC tools , WARNING: NOT applicable for climbing, swing, hammock, punching, etc.