The air speed of 170 mph and air flow of 520 CFM makes cleaning up your driveway, Sidewalk, or yard a breeze. The 7 in. Spinner style lead wheel provides maximum maneuverability which makes clearing debris effortless. The swivel function of 20掳 and 30掳 on the base unit (Swstm4317) allows for the redirection of air flow for maximum versatility and efficiency. The centrifugal clutch stops the blower function when unit is idling. The Southland add-on blower Attachment for the Southland wheeled string trimmer mower (model # Swstm4317) is the perfect accessory for clearing up your outdoor space.