STIHL RG-KM - ROTARY TRIMMERSTIHL RG KM ROTARY TRIMMER Similar to a weed removing brush, the STIHL RG KM rotary is an efficient tool for landscapers, garden maintenance workers and road maintenance teams, enabling them to effectively remove weeds and grass from gravel, asphalt or paved surfaces. The STIHL RG KM rotary cutting head is designed for low spin mowing: unlike with rotating mowing lines, the upper and lower blades of the cutting head are offset from each other by