ITEM:Diamond Vacuum Brazed Hexagon Shank Drill Bits Quantity:1pc only Specification: Brand Name:HIGHDRIL Certification:CE Certification Origin:China Diamond Mesh:#35/#40 Working Length:10mm Material:Diamond Vacuum Brazed Is_customized:Yes Total Length:80mm Diameter:16/18/20/22/25/30/32/35/38mm Application: For drilling granite , marble, masonary, concrete, tile,ceramic, glass, hard plastic and so on. Feature: 1. The cutting-edge vacuum brazing process has greatly improved the product quality and service life, higher efficiency and lower cost; 2. Multi functional design, suitable for a variety of materials to meet the use needs of different scenes; 3. Hexagonal handle design, opposite handle diameter 8.3-10mm, more stable clamping and more stable drilling; 4. 10mm high emery at the top of the bit, which is densely arranged to make the drilling faster and longer service life; 5. 6-14mm internal wax cooling, dry drilling without water; When drilling, the wax will melt to lubricate and cool the drilling surface; 6. 16mm and above, with U-groove on the top of the bit to improve the working efficiency of the hole drill; There are chip removal holes on the side, which is conducive to heat dissipation and chip discharge; 7. Less drilling debris, less wear on materials and better finishing effect; 8. Use a suction cup locator to position the hole accurately, or place the drill bit at a 45 degree angle to drill the hole until the drill bit begins to penetrate the material, and then lift the drill bit to vertical Position and continue; 9. Ensure that all forms of impact or hammering are closed;