The Master Lock No. 5KALJ Laminated Steel Padlocks, Keyed Alike - multiple locks open with the same key - feature a 2in (51mm) reinforced laminated steel lock body providing extra strength and a 2-1/2in (64mm) tall, 3/8in (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