Description of PorcelainPlus Speedbit Tile Glass Bit
3X Longer Life & 2X Faster Cutting Speed (than Conventional Carbide Bits). Recommended for use on porcelain & glass tile, granite, marble, ceramic, glass & mirrors. Average of 25 seconds per hole (based on PEI Class 5 porcelain tile). Drills 10+ holes per bit (based on PEI Class 5 porcelain tile). Specially formulated carbide tip for greater durability, no walking & clean precise holes