The master lock stainless steel fixed dial combination padlocks have 18mm hardened steel shackles they are a tough and durable leisurelifestyle security solution ideal for locking up a locker or sports bag designed to be tough practical and durable but to look good as well supplied with a lifetime warranty against mechanical failure suggested uses lockers cupboards and sports bags please note colours may vary specification internal shackle dimensions 17 x 18mm shackle thickness 6mm