Master Lock® Safety Padlock, Commercial Grade Non-Rekeyable, Alike Key, Laminated Steel Body, 9 mm Shackle dia, 26 mm Shackle Height, 24 mm Shackle Width, Steel Shackle, 55 mm Body Width, 4-Pin Tumbler Cylindrical/Ball Bearing. The master lock No. 5MK laminated steel padlock features a 55 mm reinforced laminated steel lock body providing extra strength and a 26 mm tall, 9 mm dia hardened steel shackle for excellent cut resistance. The ball bearing locking mechanism provide extra 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. Master Lock® Safety Padlock, Commercial Grade Non-Rekeyable, Alike Key, Laminated Steel Body, 9 mm Shackle dia, 26 mm Shackle Height, 24 mm Shackle Width, Steel Shackle, 55 mm Body Width, 4-Pin Tumbler Cylindrical/Ball Bearing