... won five national invention patent. The motor adopts imported motor, torque, high efficiency, long life, tool USES the independent design of ... rot disease.Directions for use1, biting the spindle with 14 wrench, biting lock nut with 17wrench,counterclockwise loosen the lock nut2 ... the cutting tools3, with 14 spanner fixed spindle, with 17 wrench clockwise rotation, will lock nut lock4, connected to 12v ...