On Mar 2, 5:58*am, "J. Clarke" wrote:

They've got a 1/4 inch die grinder for ten bucks as well--next time
I'm over there I think I'm going to get one of those.

Mine (with a carbide burr that was looted from some other
machine) does a good job of dealing with plaster walls.
I've put in dozens of outlets recently, and the wallholes made with my
other techniques are MUCH sloppier.