Review on Enhance Your Cutting Performance with Lenox Tools 2995858CG Master Grit Carbide by Will Lockhart

For cutting holes in plaster for electrical boxes. The plaster is about 1 inch thick. The first few holes were ok but the fifth hole barely made it. The sixth hole only went about 1/4 inch. Dumb and shot. I only have a few holes left and there is nothing left to do but order another one.