The Master Lock No. 5UP Universal Pin Laminated Steel Padlock features a 2 inch (51 mm) wide laminated steel body for superior strength and a 1 inch (25 mm) tall, 3/8 inch (10 mm) diameter hardened boron alloy shackle for superior cut resistance. The 4 pin cylinder prevents picking and the dual locking ball bearings provide resistance against prying and hammering.