Outstanding lifespan in hard tiles - This special hard ceramic drill bit utilizes Bosch's carbide technology. Carbide is the hardest of all metals. It is combined with an advanced multi-cutter 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. Hexagonal shank for a strong connection and maximum torque transfer in three-jaw chucks and 1/4-inch internal hex tool holders.