adopts brushless motor that does not generate sparks when in operation and the motor does not wear out, high 19500rpm rotation speed for reliable and productive work. easy replacement of abrasive discs with humanized design chuck lock. conform to the design of human engineering handle, one-handed operation, convenient side lever switch for easy grip and use. thickened baffle design reduces debris splashing from the room into the machine, makes it safer and can effectively extend the service life of the machine. ventilation holes on the housing, high heat dissipation for cooling the operating mechanism against overheating. can be used for surface conditioning and grinding or cutting iron and home improvement. wide application, perfect for polishing, sanding and cutting ceramic tiles, wood, stone, steel and so on.