KAHEIGN 10Pcs Masonry Drill Bits, 6/8 /10 /12mm Tungsten Carbide Bit Set for Porcelain Ceramic Tile Concrete Brick Wall Glass Mirrors Plastic Wood

[High Quality] Masonry drill bits made of high quality tungsten carbide, with a strengthened Head, high hardness, not easy to break and bend, surface rust treatment, long service life [Spear Bit Head] Spear sharp edges deliver high drilling speed even in hard materials, perform 85% faster than standard bits, U-shape groove provide good chip removal [Triangle Shank] The triangle design of shank helps the hand electric drill to clamp the drill bit and prevent slipping and wandering, fit for most hand electric drills [4 Size] Masonry drill bit with 4 different sizes: 4 x 6mm, 2 x 8mm, 2 x 10mm, 2 x 12mm, various sizes for different use, perfectly fit various drilling tasks, and high drilling accuracy [Applicable] Great for most materials in interior fitting work, metal, glass, ceramic tiles, wood, ceramics, stone, concrete, bricks, etc. (When drilling hard material, please use water for lubrication)