Lasts up to 10 times longer than standard tile drills. As wall tiles are now larger and harder, drilling holes with a tile drill is becoming increasingly difficult. For this reason, Bosch has developed the Expert HardCeramic drill. This drill can be used to drill hard ceramics dry. Additionally, it lasts significantly longer than our benchmark tile drill. This special hard ceramic drill utilizes Bosch's carbide technology. Carbide is the hardest of all metals. It is combined with an advanced multi-edged tip that distributes the workload across several asymmetrical surfaces. This complex drill tip, manufactured using a fine-tuning production process, also allows for precise starting without slipping or scratching. The Bosch Expert HEX-9 HardCeramic drill is suitable for drilling ceramics. It can drill holes in hard tiles without the need for lubricants or cooling. Hexagonal shank for maximum power transfer in standard drill chucks and hex screwdriver chucks. Diameter (D) mm: 8.00, total length (L2) mm: 90.