Densely filled fiber is staple set in a foam plastic block with one threaded handle hole. This high quality brush is recommended for use on all types of vehicles, freight vans, trucks, boats, etc. Flo-thru hole for fountain type handle. Handles sold separately. Although these high-quality brushes are recommended for use on all types of vehicles, some finishes may be more susceptible to scratching than others; always test in an inconspicuous area before use.