Circuit Breaker Lockout Circuit Breaker Lockout Type Clamp-On For Circuit Breaker Type Single Pole For Maximum Padlock Shackle Diameter 5/16 in For Voltage 120/277V AC Maximum Number of Padlocks 1 Overall Height 2.2 in Overall Length 0.36 in Overall Width 0.95 in Features Thumb Screw Tightening Mechanism For Use With Circuit Breaker Switches Includes Cleat Lockout Color Red Lockout Material Polypropylene Mount Type Clamp-On