General description Professional Type Vacuum brazed (VB) diamond drill bits are designed for dry or wet drilling of various hard materials including ceramics, porcelain, tiles, granite, marble, and stoneware. These drill bits offer higher efficiency and durability, making them suitable for extended use on hard surfaces. Technical specifications Diameter: 10mm Thread type: M14 Drilling type: Dry and Wet Usage Ideal for creating holes for water inlets, drains, and light points. Can drill dozens of dry holes in hard porcelain with a lifespan nearly ten times longer than galvanized bits. Capable of drilling many more wet holes. Other information To extend the life of the diamond drill bits, follow the correct instructions for use.