Yes I think so,,,although there are differences with the pin configurations. We use the standard size pin out configuration and I think these would be suitable for most standard size single pole breakers. We bought a kit which contained all of the different configurations and isolator locks etc. just to show the students the various lock off devices which are available. I think it was about £60...not much really when you consider the safety aspect. There is a big drive on safe isolation in Scotland just now and I plan on issuing all 3rd stage apprentices with a standard MCB lock off device to keep in their tool box. It is amazing how many Journeyman do not know of the existence of such devices.I was taking a 17th Edition class recently and asked the guys about their safe isolation techniques...insulating tape seemed to be the standard reply...