Diamond coated and designed for all types of tile including porcelain. No water required. Can be used directly onto any angle grinder (M14 thread) or any mains powered drill using M14 Chuck Adaptor. This 12mm wax-filled diamond tile drill is suitable for porcelain, ceramic tiles & hard materials. It can be used on an angle grinder or mains drill with a Hex Adaptor (Part number 57587). The MEXCO Diamond Tile Drill Bit Range offers maximum performance and cost per cut when drilling the hardest of man-made and natural decorative materials. No water is required due to a special wax-filled core that melts, lubricates and cools when drilling. Supplied to fit M14 thread Angle Grinders although an M14 to Hex adaptor can be used with a High Speed Drill. Suitable for dry cutting.