ALC Miniature Circuit Breaker Lockout Device. Locks virtually all miniature ISO/DIN circuit breakers throughout the world. Thumb turn dial screw for easy attachment - no tools required. Dial is inaccessible in the locked position to prevent removal. Safety padlock can be applied horizontally or vertically. Can be mounted side-by-side on adjacent miniature circuit breakers. Durable thermoplastic material is chemical resistant and performs effectively in extreme environments. Works with all Master Lock and American Lock safety padlocks and lockout hasps- PI - CBL