Circuit Breaker Lockout Circuit Breaker Lockout Type Clamp-On For Circuit Breaker Type Single Pole For Maximum Padlock Shackle Diameter 9/32 in For Voltage 480/600V AC Maximum Number of Padlocks 1 Overall Height 1.72 in Overall Length 1.03 in Overall Width 2.97 in Features Knurled Thumbscrew with Slot for Optional Screwdriver Adjustment One-Piece Design Permanently Fixed Cleat Adds Physical Blocking Capability Requires No Tools for Installation