We offer discount for large quantity. We invite you to ! Diamond Drill Bits, Hollow Drill Bit Set with Hole Saw, 10-Piece Tile Opener with Hole Saw Guideline Setting, Suitable for Ceramics, Glass[Exquisite Craftsmanship] This diamond drill is made of industrial carbon steel with a nickel-plated corrosion-resistant coating. Thickened diamond coating on top provides superior cutting strength for precise, smooth cuts without the need for hemming for maximum drilling results. [Ergonomic design] large drill hole helps cooling water enter, prevents chips and other particles from being thrown into the drill hole, ensures smooth punching, and facilitates the drilling process. Small hole-when debris is caught in the cutter. We can pull it out with a screwdriver. Give you an excellent experience. [Adjustable Handle] Adjustable Cutter Drill Bit with Suction Cup - The maximum length of the plate hole is 7.62-2.54cm, which is large enough to fit all sizes of cutters. Removable ball bearings, two models (fixed 3 or 4 bearings) for your choice, just rotate the chessboard. [Various sizes] This diamond hole saw set is equipped with 10 different drill bits for different needs. Includes the following diameters: 6mm, 8mm, 10mm, 12mm, 20mm, 25mm, 30mm, 35mm, 40mm, 50mm, 10-cutter drill bit + 1-cutter railway clamp + 1 screwdriver. [Perfect] This diamond coated cutter can be used to remove rings from glass, marble, tile, ceramic, pvc or other materials. When the diamond drill bit is working, it should continue to add water, reduce the drilling speed, reduce the drilling pressure, increase the water lubrication, and greatly extend the service life of the drill bit. Color: Blue+SilverMaterial: Carbon SteelPackage Content:10 * Drill Holes (6mm,8mm,10mm,12mm,20mm,25mm,30mm,35mm,40mm,50mm)1 * Guide Cutter1*1.5# philips ScrewdriverNote: If you can smell a burning smell, please return it! Either too fast or too stressful.1. The drill you drill should not be exposed to high or even high temperatures.2. Not suitable for concrete or deeper than 1.27 cm.3. Lubricating water is needed during drilling, which greatly extends the service life of drilling. Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm. About UsWe provide good product with best price, we support wholesale order/