The Mexco Diamond Tile Drill Kit 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 adaptor is included to convert for use with a high speed drill. Kit Contents: 6mm Tile Drill Bit 7mm Tile Drill Bit 8mm Tile Drill Bit 10mm Tile Drill Bit M14 to Hex Adaptor Cooling Wax Robust Carry Case