The Master Lock No. 1KA Laminated Steel Padlocks, Keyed Alike - multiple locks open with the same key - feature a 1-3/4in (44mm) reinforced laminated steel lock body providing extra strength and a 15/16in (24mm) tall, 5/16in (8mm) diameter hardened steel shackle for excellent cut resistance. Dual ball bearings locking for maximum pry resistance making it ideal for industrial applications. Keyed alike padlocks available to order to match other locks with the W1 cylinder.