- Ref: ML-421 - Weight: 0.1Kg - Inside jaw: 38mm - Padlock capacity: 6 - SteelMaster lock Safety Lockout Hasps are designed for use by multiple workers at each lockout point. Control cannot be turned on until the last worker's padlock is removed from the hasp. Multiple styles available to fit most needs; Spark resistant aluminium, Pry-resistant steel, Dielectric plastic.