Hole opener drill bit gold

MaterialsThe drill bit set is made of alloy as raw material. The oxynitride process of the cutter head strengthens the hardness of the drill bit.Surface electrophoretic painting process The drill set is comprehensive and rust-proof grinding treatment, clean and sharp without burrs. The drill bit is more wear-resistant and more durable. Fully automated polishing, polishing is fully automated, each one is unique.Unique cross angle design Small incision resistance, stable drilling functionality, fast speed, without breaking the boundary. Careful opening, smooth, no broken edges, no shaking phenomenon, easy to chip.5 different sizes Suitable for your different needs. It can be installed in general electric hand drill, bench drill. The clamping range of the machine drill is 10mm and above.Widely used Professional glass and tile drill bits provide smooth and precise drilling in ceramic tiles, marble , thin iron plates, mirrors and glass. Remember to add water or coolant when drilling.Specifications:Materials: Cemented CarbideProduct weight: 125GProduct size: 3*70/4*70/5*76/6*77/ 7*80MMPackage included:Universal drilling tool (5 pieces) * 1