Corded Drills, Drivers -Diamond Ceramic Router Bit Highlights Generic Brand Diamond Ceramic Router Bit Description: Mainly used for drilling porcelain tile, ceramic tile, marble, granite, concrete reinforcement and other hard materials. Gold painted on the body of this bit to prevent rusting. Opening neat, smooth, no broken edge, no shaking phenomenon, chip easily Small incision resistance, stable drilling function, fast speed, no boundary breaking. Suitable for drilling faucet mounting holes in stone countertops, plumbing lines in showers and vanities. Specification: Method of use: use wet or dry To prolong its service life, must use with water for cooling and lubrication. Hole saw can be used with bench drill, hand electric drill. When using a hand electric drill, start slowly, 45 degree angle, go vertical after making an initial mark. Material: Diamond Color: gold Total length: approx. 85mm / 3.35in Shank diameter: approx. 9mm / 0.35in Opening diameter: approx. 50mm / 1.97in Opening diameter: approx. 35mm / 1.38in Package includes: 2 Piece Drill Bit Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.