The Master Lock No. 3UPLF universal pin laminated steel padlock features a 1-9/16 In. (40 mm) wide laminated steel body for superior strength and a 1-1/2 In. (38mm) tall, 9/32 In. (7 mm) 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. Dual ball bearings locking for maximum pry resistance and the 4-pin tumbler cylinder helps prevent picking. Uses No. 376 Universal Pin Keying Tool.