Universal Drilling Tool With Various Materials And High Efficiency main features high quality materials It is made of high quality YG6X alloy. The nitrogen oxide process of the bit enhances the hardness of the bit. surface electrophoretic paint process Fully polished and rust proof, clean and free of burrs. The drill bit is more wear-resistant and durable. Automatic polishing: the CNC polishing is automatic, and each piece is unified. unique cross angle design The cutting resistance is small, the drilling is stable, the speed is fast, and the edge is not broken. The opening shall be neat, smooth, without broken edge, tremor and not easy to crack. widely used Professional glass and ceramic tile drills can drill smoothly and accurately on ceramic tiles, marble, thin iron plates, mirrors and glass. Remember to add water or coolant when drilling. 5 different sizes Suitable for your different needs. It can be installed hand drill and bench drill. The range of machine drilling fixture is 10mm and above. Specifications Material: cemented carbide Product weight: 90g Product size: 3 * 70 / 4 * 70 / 5 * 76 / 6 * 77 / 8 * 80mm Package content: 1X universal drilling tool (5pcs) Note: Due to manual measurement, please allow slight measurement deviation. Due to the different display and lighting effects, the actual color of the commodity may be slightly different from the color shown in the picture.