The Master Lock Laminated Steel Padlocks, Keyed Alike – multiple locks open with the same key – feature a 2″ (51mm) reinforced laminated steel lock body providing extra strength and a 1″ (25mm) tall, 3/8″ (10mm) diameter hardened steel shackle for excellent cut resistance. Dual ball bearings locking for maximum pry resistance making it ideal for industrial applications and the non-rekeyable, 4-pin W1 cylinder helps prevent picking. Keyed alike padlocks available to order to match other locks with the W1 cylinder.