
Durable Material: Sintered at high temperature, the diamond drill bit can be very precise and smooth without broken edges. Reducing the drilling speed, reducing the weight of the drill bit, and increasing the use of water lubrication greatly extend the service life of the drill bit. 10 Different Sizes of Hole Saw: This diamond hole saw set comes with 10 different drill bits to meet different needs. 6mm/0.23", 8mm/0.31", 10mm/0.39", 12mm/0.47", 20mm/0.78", 25mm/0.98", 30mm/1.18", 35mm/1.38", 40mm/1.57", 50mm/1.97". Adjustable Hole Locator: With suction cup, the maximum opening length of the board is 3.5 inches, which is large enough to fit all hole saws. Movable ball bearings, two modes (3 or 4 bearing fixation) are for you to choose, just turn the board over. Application: Can be used to remove holes in glass, marble, ceramic tile, ceramic, PVC or other materials. Note: When drilling, please let the water increase the lubricity, which can extend the life of the drill. Complete Set: