The Master Lock S2394 Universal Miniature Circuit Breaker Lockout Device locks virtually all miniature ISO/DIN pin-out circuit breakers throughout the world. The patented device features a thumb turn dial screw for easy attachment, no tools required. Device attaches to circuit breaker and makes dial inaccessible in the locked position to prevent removal. Padlock can be applied horizontally or vertically, and design allows device to be mounted side-by-side on adjacent breakers. Device works with all American Lock and Master Lock safety padlocks and lockout hasps (does not include ALO80 or ALO802).