The American Lock No. A50 Solid Steel Padlock features a 2in (51mm) wide solid steel body and a 1-1/8in (29mm) tall, 3/8in (10mm) diameter hardened boron alloy shackle for superior cut resistance. A dual ball bearing locking mechanism resists pulling and prying while the 5-pin non-rekeyable cylinder with serrated pins is virtually impossible to pick.