Item dimensions L x W x H20.1 x 18 x 9.9 centimetres StyleM14 20-65 mm Item weight2.8 Pounds Compatible materialStone Number of pieces1 Sturdy and durable materials: the cutting blade of the diamond hole saw is made of high-quality diamond, which provides more effective performance than conventional carbide or bimetal hole saws. Easy Installation The diamond drill bits for ceramic should be connected to an angle grinder. Drill a pilot hole to start drilling so that the saw does not deviate from the desired hole position. High Performance The ceramic drill bits for pots have holes in the housing to ensure that the chips can be effectively removed while the blades rotate at high speed. FINE PORTABLE CASE The 6 pieces diamond drill bits come with a compact box where the drill bits are not used. You don't have to worry about one of them missing. Wide Application The hole opener ensures a clean and accurate hole in the toughest and most abrasive materials such as tile, granite, marble, other stones and porcelain.