These Keychains are made of 1.5mm thick pure stainless steel, waterproof and weatherproof. Cable Length: 10cm/4inch, 15cm/6 inch, 20cm/8inch, 25cm/10inch available, Please choose right length from Variation List Ultra-tough braided and heavy duty, good for daily use. Chains can be combined and Added length since screw up two or more items. Perfect for hanging luggage tags, keyrings, ID tag keepers, flashlight, pliers, car key, USB flashdrives, etc.; can also be used as binder ring for paper. EASY to add and remove keys: Bend the cable and aim at the ring hole and screw up. These Keychains are made of 1.5mm thick pure stainless steel, waterproof and weatherproof.