3 Review(s)

0Pcs 5mm/0.2inch Diamond Glass Drill Bit in a PackMaterial: Metal, Diamond Particles CoatedHole Saw Diameter:Description?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.