Bosch Porcelain Tile Bits are engineered for fast, accurate, and efficient drilling in hard materials like porcelain and ceramic, marble and granite tiles, and more. The durable carbide tip is optimized for ceramic tile drilling and delivers up to 5X more life than Bosch glass and tile bits when drilling in porcelain tile. An innovative arrow-shaped design allows for faster, easier drilling with less friction, for reduced bit wear and tear, delivering extended life. The bit's enhanced centering zone delivers easy positioning for more precise drilling. Experience maximum torque transmission and secure connection with the chuck through the impact-rated hex shank.