Made from high quality materials using high quality carbide raw materials. The ceramic tile drill bit is made of high quality carbide, strong, sharp, durable, wear-resistant and not easy to deform and break. The titanium coating on the surface makes the product not easy to fade. High temperature brazed carbide blade, sharp and wear-resistant. Surface anti-rust treatment, easier drilling and chip removal. The surface is finely polished. Using environmental protection technology, thick chrome nickel anti-rust treatment. Good wear resistance, high hardness and long service life. Professional glass and tile drill bits Drill bit for gentle and precise drilling in ceramic tiles, ceramic tiles, marble, sheet metal, mirrors and glass. Remember to add water or coolant when drilling. It adapts to your different needs. Can be installed on general hand drills, electric drills, etc. A workbench, a cordless drill and an electric wrench. Suitable for glass, tiles, wood, ceramics, stone, concrete, bricks, etc. When drilling hard materials (glass, porcelain, marble or granite), please lubricate with water. The product contains: Cross Alloy Drill Bit 3+4+5+6+8+10+12mmNote: The data are all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be will have a certain color difference, the actual object received shall prevail.