Durable material: Made of hard alloy steel. This glass drill bit set is suitable for glass, ceramic tiles, marble, cement walls, plastics, etc. Once passed through a tile or mirror, this drill bit Easy to support all masonry projects and durable. High performance: These drill bits are sharp and wear-resistant, making them perfect for drilling holes in bathroom tiles or wall mirrors. Multiple sizes: 4, 5, 6, 8, 10, 12mm. Hexagonal drilling tube: 6.35mm. The hexagonal drill bit is made of carbide and has a perfect head shape, which can prevent the drill bit from cracking and extend its service life. Tungsten carbide tip: The glass drill bit has a pointed tip made of tungsten carbide, which can prolong efficiency and service life. The package you received includes 6 pieces glass and ceramic tile drill bits, packed with double bubble caps for portability easy. Very suitable for drilling holes in tiles, glass, marble and mirrors. When drilling hard materials, please This 6 piece drill bit set will provide the best tile and glass drilling experience for your various projects or jobs. feature: -4-12mm tip, suitable for smooth and precise drilling. -Hex shank size is 6.35mm. -High quality, sturdy and durable. -Remove hard alloy tool. -The drill bits are very suitable for drilling tiles, glass, ceramics and mirrors. Contents: -A set of 6 drill bits for glass tiles, ceramics and mirrors. Note: The data is manual measurement, please allow 1-3cm error, due to the differences between light and screen, there will be a certain color difference, the specific received in kind shall prevail.