... rot disease.Directions for use1, biting the spindle with 14 wrench, biting lock nut with 17wrench,counterclockwise loosen the lock nut2. Insert ... place of the cutting tools3, with 14 spanner fixed spindle, with 17 wrench clockwise rotation, will lock nut lock4, connected to 12v ... back, nudging down, pay attention to the scraped bark gently with knives, not barbaric operation, to prevent damage to the ...