Lasts up to 10 times longer than standard tile drills - As wall tiles are now increasingly larger and harder, drilling holes with a tile drill is also increasingly difficult. For this reason, Bosch has developed the Expert HardCeramic drill bit. It can be used to drill hard ceramics dry. It also lasts much longer than our benchmark drill for tiles. Bosch's Carbide Technology is used for this special hard ceramic drill. Carbide is the hardest of all metals. It is combined with an advanced, multi-bladed tip that distributes the working load over several asymmetrical surfaces. This complex drill tip, which is manufactured using a fine-grinding manufacturing process, also enables precise spot drilling without slipping or scratching. The Bosch Expert HEX-9 HardCeramic drill bit is suitable for drilling ceramics. It can drill holes in hard tiles without lubrication or cooling. Hexagonal shank for maximum power transmission in standard drill chucks and chucks of hexagonal screwdrivers. Diameter (D) mm: 7.00, total length (L2) mm: 90