Specialized in grinding screw tap. It's precise easy operation and efficient, also can save large sun of expense for purchasing blade annually. The electrical controlled high-rate DC motor features stable power, strong horsepower, efficient and long service life. Developed and researched A5 can sharpen the screw front angle, the front angle can control at random. Drill bit can sharpen the drill bit point angle, lip relief angle and front cutting lip, you also can control the centre spot at random instend of centre drill, easy vent scraps, relax drill.
