Use this diamond tile drill bit on granite, porcelain and glass mosaic The Abracs TDB06 6mm Expert Dry Diamond Tile Drill Bits offers extreme lifetime, ultimate performance and precision drilling for all tiles including granite, porcelain and glass mosaic. Featuring premium quality steel body construction, self-sharpening multi-layered diamond tip for fast and effective drilling. These drill bits also come with a unique wax coolant system that absorbs heat, eliminates the need for additional water cooling and increases drilling speed. Features: Suitable for granite, porcelain and glass mosaic Self-sharpening for long-lasting drilling performance Self-cooling Hex shank Specification: Diameter: 6mm