ITEM:Diamond Vacuum Brazed Triangular Shank Drill Bits Quantity:5pcs/set Specification: Brand Name:HIGHDRIL Certification:CE Certification Origin:China Is_customized:Yes Diamond Mesh:#40/#45 Working Length:10mm Total Length:65mm Diameter:6mm Material:Diamond Vacuum Brazed Application: For drilling granite & marble, masonry, concrete, tile/ceramic, glass, hard plastic and so on. Feature:1. Multifunctional, suitable for a variety of materials, to meet the needs of multiple scenarios; 2. Three sided handle design,handle diameter 10mm,more stable clamping, more stable drilling; 3. 10mm high emery at the top of the bit, which is densely arranged to make the drilling faster and longer service life; 4. 6-10mm internal wax cooling, dry drilling without water; When drilling, the wax will melt to lubricate and cool the drilling surface; There is a spiral groove on the top of the bit, which helps to improve the drilling efficiency and discharge debris; 5. 20mm and above, with 4 u slots on the top of the drill bit to improve the working efficiency of the hole drill; 6. Less debris, less wear on materials and better finishing effect; 7. Vacuum brazing technology has greatly improved product quality and service life, higher efficiency and lower cost; 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.