Circuit Breaker Lockout Circuit Breaker Lockout Type Clamp-On For Circuit Breaker Type Multipole For Maximum Padlock Shackle Diameter 9/32 in For Voltage 120/240V AC Maximum Number of Padlocks 1 Overall Height 1.44 in Overall Length 0.75 in Overall Width 2.61 in Features Allows for Locking Out Vertically and Horizontally Adjacent Breakers Knurled Thumbscrew with Slot for Optional Screwdriver Adjustment One-Piece Design Requires No Tools for Installation