General description Professional Type Vacuum Brazed (VB) diamond drill bits are designed for both wet and dry drilling in various hard materials, including ceramic, porcelain, tile, granite, marble, and sandstone. These drill bits provide higher efficiency and a longer lifespan, making them ideal for drilling holes for water inlets, drains, and light points. Technical specifications Diameter: 10mm Connection: M14 thread Installation Can be used directly on an angle grinder. Usage Suitable for both dry and wet drilling. Can drill multiple holes in hard porcelain, with a lifespan significantly longer than galvanized bits (up to 10 times). For optimal performance, follow the correct usage instructions to extend the life of the drill bits.