Universal miniature circuit breaker lockout device locks miniature ISO / DIN pin-out circuit breakers. Features a thumb turn dial screw for easy attachment, with no tools required. The dial is inaccessible in the locked position to prevent removal. Can be applied horizontally or vertically, and design allows device to be mounted side-by-side on adjacent breakers. Compatible with all Master Lock and American Lock safety padlocks and lockout hasps. Plastic Body Chemical-Resistant Max. Shackle Diameter: 6mm Plastic Body Chemical-Resistant Max. Shackle Diameter: 6mm