The Master Lock No. 10KA Laminated Steel Padlock, Keyed Alike – multiple locks open with the same key – features a 1in (25mm) wide laminated steel body for superior strength and a 7/16in (11mm) tall, 5/32in (4mm) diameter steel shackle for strong cut resistance. Ideal for septic and waste management applications, a warded locking mechanism minimizes jamming from dirt and grime.