Lasts up to 10 times longer than a standard tile drill bit - As wall tiles have become larger and harder, drilling holes with a tile drill bit has also become increasingly difficult. For this reason, Bosch has developed the Expert HardCeramic drill bit. This can be used to drill hard ceramics dry. It also lasts far longer than our benchmark drill for tile. Bosch's Carbide Technology is used for this special hard ceramic drill bit. Carbide is the hardest of all metals. It is combined with an advanced, multi-bladed tip that distributes the workload over multiple asymmetrical surfaces. This complex drill tip, made with a fine-grinding manufacturing process, also allows for 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 in hexagonal holders.