Master Lock® Safety Padlock, Commercial Grade Non-Rekeyable, Alike Key, Laminated Steel Body, 5/16 in Shackle dia, 2-1/2 in Shackle Height, 3/4 in Shackle Width, Steel Shackle, 1-3/4 in Body Width, 7/8 in Body Thickness, 4-Pin Tumbler Cylindrical/Dual Ball Bearing, 2 Bumpers. The master lock No. 1KALJ laminated steel Padlocks, keyed alike multiple locks open with the same key feature a 1-3/4 in reinforced laminated steel lock body providing extra strength and a 2-1/2 in tall, 5/16 in dia 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. Master Lock® Safety Padlock, Commercial Grade Non-Rekeyable, Alike Key, Laminated Steel Body, 5/16 in Shackle dia, 2-1/2 in Shackle Height, 3/4 in Shackle Width, Steel Shackle, 1-3/4 in Body Width, 7/8 in Body Thickness, 4-Pin Tumbler Cylindrical/Dual Ba