Corded Drills, Drivers -Diamond Holesaw Drill Bit Highlights Generic Brand Diamond Holesaw Drill Bit Description: Mainly used for drilling porcelain tile, ceramic tile, marble, granite, rebar concrete and other hard materials. A gold coating painted on the body of this bit to prevent rusting. Opening neat, smooth, no broken edges, 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-held electric drill, start slowly, at a 45 degree angle, go vertical after making an initial mark. Material: Diamond Color: gold Total length: approx. 75mm / 2.95inch Stem Diameter: Approx. 4mm / 0.16inch Opening Diameter: Approx. 6mm / 0.24inch Package includes: 5 pieces of 6mm diamond drill bit Note: Please allow 1-3mm due to manual measurement, make sure you do not mind before you bid. The colors may be different for the different monitors, please understand.