Those are made of sturdy and durable polymer. Easy to use with just one hand. You can use it to attach your keys, camping gear, bottles or staff to your backpack or . Perfect for various occasions, such as key chain, hammock, camping, gym, hiking, backpack and more. Feature - ColorAssorted Color - Material: plastic - Size: 8.5 x 5.47 x 0.73cm - Those heavy duty and quick release D rings are made of polymer, lightweight, sturdy and durable - Spring loaded makes it easy to lock with just one hand - Can be used as to easily attach your keys, camping gear, water bottles or your light to your pack, backpack, and . - Perfect for various occasions, such as key chain, hammock, camping, gym, hiking, backpack and more. - Caution: for your , the carabiner keychain is not recommended in mountaineering, rock/ice climbing, and other games. Package list: 6 x