Bosch GBL 620-Watt Air Blower (Blue) Cleaning of all appliances and difficult to reach areas from the distance blowing the cut materials and wastes away from the job area to have clean view and work further air drying after paining, water washing and surface treatment. Ariable speed dial wheel for easy flow speed adjustment ambidextrous lock on and handgrip design suitable for left/right handed users easiest and most convenient fixing of nozzle and dust bag.