The American Lock No. A3801 Solid Steel padlock features a 1-3/4in (44mm) wide solid steel body and a 2in (51mm) tall, 7/16in (11mm) diameter hardened boron alloy shackles for superior cut resistance. A dual ball bearing locking mechanism resists pulling and prying. Padlock available with or without core with a choice of 18 keyways to match your door security system.