SHARP & CUT The diamond creates a high precision, cut with no broken edges. for making clean and accurate holeSATISFIED SIZE Cutting hole diameter : 6mm / 0.23 inch, length: 5cm /2.5inch. Super drill bits you can drill where you to drill your hole and use it as a "guide" to the holeOPERATION 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 , extend drill bit life considerablyAPPLICATION Hole saws perfect for drilling glass, tile, porcelain tile, ceramic tile, brick, blocks jars, mable, granite light stoneMaterial: Diamond + MetalGood Performance:Diamond dust coating offers superior performance and cutting strength. Diamond coating maximizes performance and retains a than carbide or bimetal hole sawsNo tremor phenomenon, small incision resistance and fast hole speed, easy chip evacuation, ensuring you a experince when using diamond .Wide Application of The Tile : set for wet cutting tiles, glass, fish tanks, , granite, ceramic, porcelain, bottles, quartz sinks.50 diamond coated core hole saws for kitchen, bathroom, shower, faucetsSpecifications:Color: SilverHow to Use Tile Drill Correctly:Use pen to of hole, and keep wet with water or coolant.Angle drill 45 degrees to hole, and being drilling at low speeds. Angle drill to vertical position the hole has started.Minimum pressure. Slow speed down for exit hole or drill from the other side to prevent breakthrough.Note:Electroplated diamond coating will wear off if the tool gets too hot. Never let your drill bit run dry. keep adding water when the diamond drill bits are working on the glass or .Package Contents:50 x Diamond Drill BitOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.