Description: The diamond hole saw kit are made of diamond integrated steel, which are strong and sturdy. The surface adopts high anti-corrosion electroplating process, and thickened diamond coating on the top provides excellent cutting strength for high-precision, smooth cuts. Reducing drilling speed and pressure, increasing the use of water lubrication will greatly extend the service life.Specification:Material: DiamondCompatible Material: Ceramic, Glass, Tile, Porcelain, Marble, Granite, Thin Wood10PCS Brazed Hole Saw: 6mm / 0.24 ", 8mm / 0.31", 10mm / 0.39 ", 14mm / 0.55 ", 18mm / 0.71 ", 25mm / 0.98", 28mm / 1.1", 32mm / 1.26 ", 40mm / 1.57", 50mm / 1.97 "Package Content:-10 pieces of professional brazed dry diamond hole saw;-1 piece of double suction cups ceramic tile holes locator;-1 piece of screwdriver for cleaning up debris in the hole saw after drilling;-1 instruction manual.Instruction for Use: STEP 1: Mark the hole pointClean the surface and keep it wet with water & coolant, then markdown the position of the drill hole.STEP 2: Set up locator & hole sawPut the drill bit into the limit hole and press down the handle of the suction cup to lock the position.STEP 3: DrillingAdjust the chuck positioning knob for the suitable size. Tight the screw to lock the position and drill with water.