[High quality] Made of high quality tungsten carbide, with a strengthened head, high hardness, not easy to break and bend, surface rust treatment, long service life[Multi-grind bit head] Multi-grind sharp edges deliver high drilling speed even in hard materials, performfaster than standard bits[Triangle shank] The triangle design of shank helps the hand electric drill to clamp the drill bit, prevent slipping and wandering, fit for most hand electric drills[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)Delivery Quantity: 6pcs,Package Contents: Only the above package contents, excluding other products.Size: Shank diameter 5-11mm, diameter 4.5.6.8.10.12mm, maximum cutting depth 65mm(Reminder: The size is measured manually, please allow 1-2 cm measurement error)Color: silver with orange(Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)