Circuit Breaker Lockout Combo Pack Circuit Breaker Lockout Type Clamp-On For Circuit Breaker Type Multipole For Maximum Padlock Shackle Diameter 9/32 in For Voltage 120/277V AC Maximum Number of Padlocks 1 Overall Height 1.25 in Overall Length 3.5 in Overall Width 3.5 in Features Thumb Turn Clamping Handle For Circuit Breaker Manufacturer Grip Tight For Use With 491b Fits Wide or Tall Breaker Toggles 493b Fits Standard Height Tie-Bar Toggles