Alpha® introduces the Electroplated Wet Diamond Drill Bits for drilling holes in tile and stone for pre-installation or post-installation placement. These bits work great on marble, granite, engineered stone, ceramic, porcelain and glass tile and panels. They can be used on a standard 3/8” or larger drill but also fit on water-fed polishers with 5/8”-11 spindles using the Drill bit Adapter. They are available in 3/16”, 1/4”, 5/16”, 3/8”, 1/2”, 1-3/8” and 1-1/2” sizes and are ideal for drilling holes for anchors for bathroom fixtures, faucet and plumbing pipes. Electroplated drill bits are a must–have for the tile installer’s tool box. * Designed for Drilling Holes in Tile and Stone for Pre-Installation or Post-Installation Placement * Works Great On Marble, Granite, Engineered Stone, Ceramic, Porcelain and Glass Tile and Panels * Can Be Used On A Standard 3/8” or Larger Drill * Can Fit On Water-Fed Polishers with 5/8”-11 Spindles Using The Drill Bit Adapter * Ideal for Dr...