The Master Lock No. 2KALF Laminated Brass Padlock, Keyed Alike – multiple locks open with the same key - features a 1-3/4in (44mm) wide laminated brass body offering excellent corrosion resistance, making this lock ideal for marine and other harsh environments. The 1-1/2in (38mm) tall, 5/16in (8mm) diameter hardened steel shackle provides excellent cut resistance. Dual ball bearings locking for maximum pry resistance and the 4-pin W1 cylinder helps prevent picking. Keyed alike padlocks available to order to match other locks with the W1 cylinder.