Wheel brushes are manufactured using a copper tube, brush filament and a steel ring or washer. The filament is placed evenly around the outside of a copper tube. The washer is placed over the filament and, using a punch press, the tube is then formed into a “U” shape around the washer. This secures the filament, which is then trimmed to the proper outside diameter.Wheel brushes are available with Carbon Steel, Stainless Steel, Brass (for non- sparking applications) Nylon, Abrasive Nylon Horse Hair and Tampico filaments.