Solid brass, high security padlock is designed for hard outdoor use. Provides reliable service in all weather conditions. Paracentric key way provides protection from picking. Double bolt locking shackle for maximum security. Solid brass pin tumbler cylinder. Excellent for use on construction sites, gates, doors, garages, storage units, lockers, etc.

55/40 size lock is 1 1/2"W, 1/4" diameter shackle.