Gasoline, electric and air-power options available. Ideal for expansion joint cleaning or green concrete cutting. Up-cut blade rotation provides level surface at the base of the cut. Vacuum port, heavy-duty, 7-gauge steel frame & undercarriage eliminates bending and vibration. Optional air motor comes fully equipped with lubricator, moisture separator and a convenient, handle-mounted on/off valve (Requires 160 CFM at 90 PSI).