The Master Lock No. 3 Laminated Steel Padlock features a 1-9/16in (40mm) wide reinforced laminated steel lock body providing extra strength and a 3/4in (19mm) tall, 9/32in (7mm) diameter 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, 4-pin W1 cylinder helps prevent picking.