Master Lock 3UP 1-1/2" Universal Pin Laminated Padlock Universal Pin padlocks for keying convenience 1-9/16in (40mm) laminated steel body for superior strength Locks pinned to customers key in minutes. Operates with same key as Master Lock padlocks Nos. 1-6 3/4in (19mm) tall, 9/32in (7mm) diameter hardened steel shackle for superior cut resistance 4-pin tumbler cylinders helps prevent picking