Use these sweepers anywhere, indoors or out, on concrete, asphalt, tile, and commercial carpets. Great for parking lots, gas stations, theaters, warehouses, schools, etc. Model JAN-SM includes two (2) brushes on each front corner with a 1/4" overlap. A retractable handle is ideal for storage. Model JAN-LG is a deluxe brush sweeper. The two (2) 11" diameter brushes, one on each front corner, come with independent 1/2" height adjustment. The bottom center brushes also features 1/2" height adjustment. Those brushes measure 17-1/2" x 5-1/2". A folding handle for easy storage is standard.