Review on Diamond 💎 Drill Bits by Bastex by Bobby Montoya

Drill bits are good for drilling multiple holes in porcelain stoneware for bath/shower installation. Due to the lightweight construction of the drills, care must be taken not to use excessive force. Spraying with water is also very important. I had to use wooden guides drilled to the size of each hole to keep the diamond bit from "walking" while drilling the holes.