The one in Trumpy's picture looks like the ones I have that are made by Brady. They work okay for locking out a circuit temorarily to service it but, like any lock, they only deter lazy people. I've had folks cut these off with sidecuts before. In a workshop for mentally handicapped I used to do service for I had a 90 lb. "resident" break one of these off with his bare hand. It cost me a good set of Kleins, but fortunately nothing else.

[This message has been edited by Fred (edited 01-21-2006).]