The Master Lock #1KA laminated steel padlocks, keyed alike multiple locks open with the same key feature a 1-3/4 in (44 mm) reinforced laminated steel lock body providing extra strength and a 15/16 in (24 mm) tall, 5/16 in (8 mm) Dia hardened steel shackle for excellent cut resistance. Dual ball bearings locking for maximum pry resistance making it ideal for industrial applications.