SUTTON TOOLS® D605-Series BLUE CERAM™ Diamond Core Bits are the professional's choice for tile drilling. BLUE CERAM™ bits feature diamond segment technology, enabling the bit to be dressed for optimal performance and longer life. They are suitable for drilling a wide variety of tiles including porcelain, monocottura, marble, glazed, terracotta, sandstone and standard ceramic tiles. These bits can be used in both corded and cordless portable drills. It is recommended to use these bits in non-impact mode and the cutting speed (with water) is <3,000 RPM. NOTE: BLUE CERAM™ bits drill oversize to allow drilling and fixing into materials below the surface without chipping the tile. Features Core Cavity - For faster material extraction, 10 mm Hex Shank - For positive grip, preventing slippage in chuck, Diamond Segment Tip - For longer life (Can be dressed with the optional dressing stone), Specifications Diameter: 25.0 mm, Working Length: 40 mm, Overall Length: 70 mm, Shank: 10 mm Hex, For use with SUTTON TOOLS® D605-Series BLUE CERAM™ Accessories, D605WAT2 - 5-15mm Water Dispenser, D605WAT3 - 20-25mm Water Dispenser, D605ST01 - Dressing Stone,