This universal trimmer harness clamp easily installs on string trimmers shaft, weed eaters shaft, edgers shaft, brush cutters shafts or any tool with a pole, shaft, or round bar. Clamp fits on most manufactures. Mount clamp near the handle or anywhere higher or lower on the shaft that feels balance and comfortable to you. Clamp is made with high quality metal for endurance and longevity. Fits shafts, poles and bars with inner diameter of 26MM, 28MM, or 1"