The American Lock No. A12KA Solid Body Padlock, Keyed Alike – multiple locks open with the same key – features a 1-3/4in (44mm) wide solid aluminum body and a 3in (75mm) tall, 5/16in (8mm) diameter zinc plated boron shackle for superior cut resistance. Ideal for corrosive environments Ideal for corrosive environments, the non-rekeyable 5-pin APTC12 cylinder can be factory keyed to your requirements.