Product Description: Material: Alloy Color: Gold Size: Shank Diameter: 6.35mm1/4 Tip Diameter: 4/ 5/ 6/ 8/ 10/ 12 mm Total length: 62/ 66/ 72/ 85/ 91/ 100 mm Package includes: 6 x Tile Drill Bits Top Material: The tile drill bit is made of high quality hard alloy, strong, sharp, durable and wear resistant, not easy to deform and break, titanium coating on the surface makes the product less susceptible to color fading . Value assortment: The package includes 6 ceramic drill bits in 6 different sizes, including 4mm, 5mm, 6mm, 8mm, 10mm, 12mm. These different size drill bits can meet your different drilling needs. Precise drilling: The sharp triangular bit greatly improves the drilling efficiency, and it can also be precisely positioned, and the drilling hole is precise without error. Hexagonal shank: The shank diameter is 6.35mm or 1/4, suitable for most drills. The hexagonal shank design allows the drill bit to be firmly fixed on the drill without slipping, so you can use it more safely. Wide application: Fit most drills, such as hand drill, charging drill, electric wrench, etc. Ideal for drilling on tile, ceramic, glass, concrete, marble, wood, plastic and more.