1、FAST SPEED: The air die grinder adopts refined steel core, precise processed, stable and smoothly in running, hard wearing, fast in rotation speed and strong in torsion output. 2、SAFETY SWITCH: The air powered die grinder is designed with safety switch, which could prevent accidental start due to accidental touch. 3、HIGH CONCENTRICITY: Pneumatic grinder adopts integrated precise collet and spindle, with stable clamping, high concentricity, without shaking hands. 4、INTEGRATED SWITCH: The start and speed control switch of the air die grinding tool are integrated. You can control the start, stop and speed at will. 5、MULTI PURPOSE: The air straight die grinder can be widely used in grinding, polishing, carving, derusting, grooving and other scenes.