10Pcs Diamond Coated Hole Saw Core Drill Bits Extractor Remover Tools for Glass Ceramic Tile Marble Rock Porcelain (5mm/0.2inch)

They are often called Glass Drill or Tile Drill, but they are much more versatile since they are used to drill glass, tile bottles, ceramics, porcelain, ceramic tile, limestone, slate, marble, granite, light stone, and fiberglass.The general rule is the smaller the diameter of your drill bit, the faster drill speed you can use. The harder your material, the slower drill speed you should use.Please always remember to use water for lubrication, or the diamond core drill will burn. Not for use on Concrete or for depths beyond about 1/2".Note: If you smell burning, back off! Either your speed is too high or the pressure you're applying is too much. Your drill bit should never be hot to the touch.No matter which size hole you want, it can always drill a perfect hole for you.10Pcs 5mm/0.2inch Diamond Glass Drill Bit in a PackMaterial: Metal, Diamond Particles CoatedHole Saw Diameter: 5mm/0.2inchPacking Weight:32gPacking Size:12x8x0.5cm

• 【Super Material】 These diamond drill bits made of high-speed steel with smooth nickel plating surface , durable and have a long sevice life,which are high quality and good performance that excellent for making clean and accurate hole.
• 【 Sharp&Smooth Cut 】Coated with high quality diamond, the diamond hole saw creates a high precision, smooth cut with no broken edges. Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably
• 【Cut-outs Design】The end of this drill bit is grooved, so the diamond coating has better adhesion .The large cut-outs at the sides and the top to facilitate the entrance of cooling water and eject the scrap, for longer life
• 【 Ideal Application】 This diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other.They are perfect for drill glass, tile bottles,blocks jars, fiberglass porcelain tile ceramic, slate Mable, granite light stone
• 【Note】When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn.Not for use on Concrete or for depths beyond about 1/2".