Features Avoid Slipping: The triangle spear head drill bits have a triangular tip, which solves the problem of wandering and slipping of the drill. High-quality cemented carbide can reinforce the drill bit, avoid drill bit cracking, and have a longer service life. Premium Carbide Material: The point head glass hex-shank drill bits are made of cemented carbide material, high hardness, good wear resistance, long service life. Paint Spraying Treatment: Overall paint spraying treatment, anti-corrosion and rustproof. Practical Tools: The hex shank allows this drill bit to work with ordinary pistol drill. Wide Application: This drill is suitable for drilling on ceramic tiles, glass, plastic, wood, floors, etc. Specification: Item Type: Hex Shank Triangle Spear Head Drill Bit Material: Carbide Quantity: 10pcs Diameter: 6mm-10pcs,  8mm-10pcs, 10mm-5pcs (Optional) Package List: 1 x Set of Drill Bit 1 x Plastic Storage Box Package List