The American Lock No. A700N Solid Steel Padlock with BumpStop® Advanced Cylinder Technology features a 2-1/2in (64mm) wide case hardened solid steel body with a 1-1/16in (27mm) tall, 7/16in (11mm) diameter hardened boron alloy shackle for superior cut resistance. A dual ball bearing locking mechanism resists pulling and prying and a 5-pin APTC12 rekeyable cylinder with serrated pins is virtually impossible to pick.