SUTTON TOOLS® D618-Series Diamond Grit Holesaw Bits can be used for dry cutting, and feature a vacuum brazed #40 diamond grit tip with a special wax-filled core to aid cooling and provide a cleaner job. They suit non-hammer action cordless and portable power drills. These bits are trade quality and are suitable for drilling porcelain, monocottura & fully vitrified, marble, glazed, terracotta, polished sandstone, standard ceramic and sandstone tiles. Features Special Wax-Filled Core - Aids cooling and provide cleaner job site, Vacuum Brazed #40 Diamond Grit Tip - For thermal and mechanical strength, 10mm Hex Shank - For positive grip, preventing slippage in the chuck, Can be used for dry cutting, Specification Diameter: 8.0 mm, Cutting Depth: 10 mm, Overall Length: 80 mm, Shank: 10mm Hex,