A little security is always a good idea, and a disc lock can help deter would be thieves. This Disc Lock is compact, weatherproof, and lightweight. It is a hardened metal rotor/disc lock which is designed to resist cutting, sawing, and chisel attacks. This lock features a chrome finish, a 10mm (0.39 inches)diameter throat pin, and includes two keys, a carrying case, and a disc lock reminder cable.