• Kwb Ceramic Drilling Diamond Drill Bit 8 mm 49051380Drills for hard ceramic tiles Suitable for hard tile drill bit, tungsten carbide tip, extra hard tungsten-titanium tungsten carbide tip drilling bits, diamond-ground cutting edges, high temperature brazed, asymmetric spiral for chip removal, optimum waste removal, all rotary and impact drills, blue color, hardness up to 9 tiles and porcelain, ceramic, roof tiles.