The American Lock solid steel padlock keyed alike – multiple locks open with the same key – features a 2-1/2 inch (64mm) wide case hardened solid steel body with a 2 inch (51mm) tall 7/16 inch (11mm) diameter hardened boron alloy shackle for superior cut resistance. A dual ball bearing locking mechanism resists pulling and prying and a 5-pin rekeyable cylinder with serrated pins is virtually impossible to pick.