Features: It can be used to polish a variety of materials, such as b-lade polishing, metal rust removal, bodhi polishing, etc., a machine with multiple uses and powerful functions. With the vent design on the side, which can ventilate efficiently, and it will not damage the motor after long-term work, which can extend the service time of the machine. It adopts all-copper motor, which has strong power and high working efficiency, which can save your time. 7 level speed regulation and stepless speed regulation can be selected, you can choose the appropriate version according to your needs. Grinding accessories include grinding wheel, drill clamp, polishing wheel and soft shaft, which can be used for grinding and polishing wheel for polishing, and flexible shafts can be used for engraving. (ONLY type3, type4, type7, type8 with the grinding acceessories.)