The wheel holder of this machine is fixed by the screw. It will never loose, automatic orientation, and automatic dissemble the wheel holder. This machine is our patent one. The transmission part utilizes gear connection. The metal band is stuck to the track surface and the sliding block coated with anti-wearboad. It can quickly handle, rapidly work, have good smooth finish and make the whole machine much more stability. As a result, it prolongs two or three years longer of overall frame service life. At present, this machine is our company's new designed high-tech edge polishing machinery in the market.