Features: [High Quality Alloy Material] Made of high quality alloy, the oxy-nitriding process of the bit improves the hardness of the drill. Long service life and easier to keep sharp than normal steel drill bits. [Precise Drilling] The drill bit has a neat, smooth opening, no broken edge and no chattering. Low resistance to cutting, stable drilling, and higher opening speed. [Durable] Full grinding and anti-rust treatment, clean and sharp, no burr. The drill bit is more wear-resistant and durable. The shank of the drill bit is hexagonal, which makes the drill clamping more firmly and the drill does not slip. Specifications: Product Name: Tile Porcelain Drill Bit, Length: 75mm, Material: tungsten carbide, Shank type: Hexagonal, Ideal for drilling glass, ceramic, wood, metal, plastic, tile and concrete, Available size: 6mm x 75mm-hexagonal, Package includes: 10 x Ceramic Drill (6mm)