The Master Lock No. 3UP Universal Pin Laminated Steel Padlock features a 1-9/16in (40mm) wide laminated steel body for superior strength and a 3/4in (19mm) tall, 9/32in (7mm) diameter hardened boron alloy shackle for superior cut resistance. A great choice for keyed alike applications, the padlock can be pinned to customer’s key in minutes and the 4-pin tumbler cylinder helps prevent picking. Uses No. 376 Universal Pin Keying Tool.