HPMAISON 10PCS Tile Drill Bits Set, Professional Tungsten Carbide Bit, Industrial Strength for Ceramic Tile, Glass, Brick, Cement, Plastic, Wood, 3 4 5 6 8 10 12mm

【High Quality 】Carbide tipped alloy head material with stronger hardness. Carbide tipped drill bits are built for longevity and will stay sharper much longer than you're typical steel drill bit. 【U Type Slot Design】 U type slot design with fast drilling dust remove, Triangular handle design, operation more stable. 【Wide Range of Uses】Pointed design strong tungsten carbide tip can easily penetrate various material(porcelain ceramic tile, glass, mirrors, plastic masonry and wood). If you use the drill bits to drill concrete, brick wall and other hard materials (glass, porcelain floor tile, marble or granite), please use water for lubrication. 【With 10 Sizes】3mm, 4mm, 5mm, 6mm, 6mm, 8mm, 8mm, 10mm, 10mm, 12mm. 3-flats shank, these drill bits for glass perfectly fit various drilling tasks, high drilling accuracy. Rotating thread design, drilling and chip removal more smoothly. 【First-Class Performance】Spear pointed design, this strong tungsten carbide tip drill bit is sharp, easy to locate, drilling stably, fast speed, not breaking the border, opening neat, smooth. The 3-flats shank ensures you can hold it firmly, without slip and scratching, will not damage the tile glaze.