The Master Lock 10KA laminated steel padlock, keyed alike multiple locks open with the same key features a 1 in (25 mm) W laminated steel body for superior strength and a 7/16 in (11 mm) H, 5/32 in (4 mm) Dia steel shackle for strong cut resistance. Ideal for septic and waste management applications, a warded locking mechanism minimizes jamming from dirt and grime.