A thicken diamond coating on the tops offers superior cutting strength for maximum drilling outcomes<br> SHARP & SMOOTH CUT The diamond hole saw creates a high precision, smooth cut with no broken edges. Excellent for making clean and accurate hole<br> SATISFIED SIZE Cutting hole diameter : 8mm / 0.3 inch, length: 6cm /2.3inch. Super drill bits you can drill where you want to drill your hole and use it as a "guide" to start the hole<br> OPERATION Start drill at 45° to surface and align to 90° as hole forms. Reduced drill speeds, low drill pressure,and water is required to cool down the drill when using them, extend drill bit life considerably<br> APPLICATION Hole saws perfect for drilling glass, tile, porcelain tile, ceramic tile, brick, blocks jars, slate mable, granite light stone<br> Good Performance:<br> Diamond dust coating offers superior performance and cutting strength. Diamond coating maximizes performance and retains a sharper cutting edge than traditional carbide or bimetal hole saws<br> No tremor phenomenon, small incision resistance and fast hole speed, easy chip evacuation, ensuring you a nice experince when using diamond hole saw.<br> Wide Application of The Tile Hole Saw:<br> Hole saw set for wet cutting tiles, glass, fish tanks, marble, granite, ceramic, porcelain, bottles, quartz sinks.<br> 50 diamond coated core hole saws for kitchen, bathroom, shower, faucets<br> Color: Silver<br> Material: Diamond<br> How to Use Tile Hole Saw Drill Correctly:<br> Use pen to mark start of hole, and keep wet with water or coolant.<br> Angle drill 45 degrees to start hole, and being drilling at low speeds. Angle drill to vertical position once the hole has started.<br> Minimum pressure. Slow speed down for exit hole or drill from the other side to prevent breakthrough.<br> Note:<br> Electroplated diamond coating will wear off if the tool gets too hot. Never let your drill bit run dry. Please keep adding water when the diamond drill bits are wor