It is made from high-strength steel, measuring 25cm x 45cm x 5cm thick for superior cut resistance. No need to remember combinations; three keys ensure you always have a spare. The black nylon cover is rainproof, dustproof, and wear-resistant, protecting the chain and preventing scratches. User-friendly cover keeps hands away from the metal chain. This steel chain with a lock weighs 570 grams, easy to carry in a backpack or on a bike. Ideal for bikes, motorcycles, gates, fences, toolboxes, and sports equipment. Neel Blue 38mm x 1m Padlock Chain, 3 Key Heavy Duty Bike Lock Chain in Black