The Master Lock® number 3KA laminated steel padlocks, keyed alike multiple locks open with the same key, feature a 1-9/16 in reinforced laminated steel lock body providing extra strength and a 3/4 in tall, 9/32 in Dia 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, four-pin W1 cylinder helps prevent picking. Keyed alike padlocks match other locks with the W1 cylinder. Keyed Alike – order multiple locks to open with the same key or order to match other locks with the W1 cylinder. Commercial-grade padlock features superior protection from drilling and prying. Non-rekeyable, 4-pin W1 cylinder helps prevent picking.