Review on Uxcell Diamond Granite Fiberglass Ceramic Cutting Tools by Keith Maynard

Easily drills holes in marble shower tiles. Wanted the hole to be positioned exactly, the size was just a gap for the pipes. So I marked the spot with a pencil cross, drilled a 1/8" pilot hole, and then used a cheap hole saw with pilot bit from a port freighter the same size as this product to make a mark for locating a 1/16" deep finish, and then use the product for the final cut hole depth.