Diameter 38mm TDXCEL Range Professional Ultra Hard Material Drill Bits This range of drill bits offer unrivalled performance and cost per cut when drilling the hardest of man-made and natural decorative materials. No water is required. The M14 connection allows use on an angle grinder and with the seperately purchased adaptor (Part Number: TDXM14HEXSET) these drills can be used in a Mains powered drill with a three jaw chuck. (For use on angle grinders & mains powered drills) Applications: Porcelain, Granite & Ceramic Tile. KINDLY REMINDER: Delivery to the UK Highlands, Channel Islands, Northern Ireland, Isle Of Wight, Isle Of Man and the following postal code areas: BT, FK, KA (1-30), PA(1-49), PA(60-78),PA80, PH, PH(11-40), PH(41-44), PH(49-50), AB, IV, KW, ZE, GY(1-10), JE(1-5), PO(30-41), IM, IR, HS are excluded from our standard delivery charge and may incur extra costs.