I made a not paying enough attention mistake when I was tiling around an electrical outlet and covered the the top screw hole of the box. I was proud of cutting the tile with a half inch leg on one side the first time without breaking it.
I need to chip away about a quarter inch to be able to use the screw hole. I've been working on it with a Dremel with a small toothed wheel and another with a ribbed ball, but the tile is too hard or the metal too soft.
Any idea what I can grind away a little tile with? Not going to remove the tile set in thin set mortar.
I'll keep trying what I have, but I'm guessing a trip to the hardware store may be in order.