The Bosch Expert HEX-9 Hard Ceramic Tile Drill Bit is designed for dry drilling in hard tiles, including porcelain. This highly durable drill bit utilizes Bosch's Carbide Technology, providing up to 10 times longer life compared to standard bits. Its advanced asymmetric tip design ensures effective material penetration, while the specially designed centering tip allows for accurate hole starting. The Hex shank ensures maximum power transfer in standard three-jaw drills and hexagonal screwdriver chucks. It delivers efficient drilling performance and can drill hard tiles without the need for lubricant or cooling. For optimal use, the tool should be operated in first gear. Technical Specifications include a diameter of 8mm, length of 90mm, and Hex shank type.