1.Tap grinder, precise, easy operation, fast, long service 2.With Taiwan diamond wheel, can be secondary re-used 3.CE Screw Tap Grinder Mr-Y31. Specialize in grinding screw tap. It’s precise, easy operation and efficient, also can save large sum of expense for purchasing blade annually.2. Send you Taiwan diamond wheel, can be secondary re-used, with accurate angle and long service life.3. The ...