When trimming your hedges at a long distance away from your body and even though the weight of the blade is only a few kilos it becomes greater due to the strain you are creating on supporting the the Stihl HL 94 hedge trimmer at a distance. So Stihl have a light Ali steel padded framed RTS harness which spreads the weight and strain evenly around and over shoulders which will not give you any pain through out the long duration of cutting.
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I have a back pain when holding my Stihl HL 94 long reach hedge trimmer for a long time?
When holding your long reach hedge trimmer for a long period of time with a single shoulder harness your muscle group in your back and shoulders will stress and get tried very quickly and cause lactic reaction in your muscles to cause discomfort. However the RTS Harness will take the pain away has the Ali steel frame takes the strain