5/16" 4 Flute Carbide Tipped Glass Tile Drill Bit, DWD4FGD5/16

4 flute carbide tipped glass and tile drill bit improves speed, longevity and accuracy compared to standard spear-tipped glass and tile drills Glass and tile drills have a tungsten carbide tips Suitable for glass, mirrors & very hard ceramic tile Rotation only Slow drilling speeds are recommended