The Master Lock No. 6KA Laminated Brass Padlock, Keyed Alike – multiple locks open with the same key - features a 2in (51mm) wide laminated brass body offering excellent corrosion resistance, making this lock ideal for marine and other harsh environments. The 1in (25mm) tall, 3/8in (10mm) 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.