OPTIMIZED FOR DRILLING IN HARD MATERIALS: For fast, precise work in porcelain tile, marble tile, granite tile and more. UP TO 5X LONGER LIFE: With carbide tip optimized for ceramic tile. (vs. Bosch glass and tile drill bits) NO SKATE, ARROW-SHAPED HEAD DESIGN: Delivers faster drilling with less effort for reduced wear and tear on the bit. ENHANCED CENTERING ZONE: Provides easier, more precise handling. HEX SHANK: Allows for maximum torque transmission and more secure connection in the chuck.