Single Pole Breaker Lockout, Clamp-On, Circuit Breaker Voltage 120/277, For Use With Tall And Wide Toggles, 491B (1TDB1), Standard Single And Double Toggles, 493B (1TDB2), Max. Number of Padlocks 1, Padlock Shackle Max. Dia. 9/32 in, Red, Height 491B (1TDB1): 1 1/4 in 493B (1TDB2): 3/4 in, Width 491B (1TDB1): 3 1/2 in 493B (1TDB2): 3/4 in, Length 491B (1TDB1): 3 1/2 in 493B (1TDB2): 3 in, Material Steel