The FAIGD7 Tile & Glass Drillbit has the following specifications: Size: 7mm. Length: 60mm. These Faithfull Tile & Glass Drill Bits have extremely hard tungsten carbide spear tips and should be used at low speeds whilst applying light pressure only. They are ideal for drilling glass windows, mirrors, bottles and ceramics. Lubricate with water for best results. For use in variable speed drills only. FaithfullA08B0072
