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 which 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. Designed for all types of tile including porcelain. Can be used directly onto any angle grinder (M14 thread) or any mains powered drill using M14 Chuck Adaptor.