The Quad Brush Adaptor holds 4 brushes* simultaneously for faster and more efficient weld cleaning with powerful weld cleaners such as Cougartron FURY 100 and FURY 200. By using four brushes during weld cleaning, you will be able to cover and clean a larger surface area and clean a larger part of the weld or metal surface with a single stroke. If damaged replace the adaptor immediately. Compatibility Superbrush WELC3146 Tip: If you want to use the Cougartron FURY brush, use the FURY Quad Brush Set (WELC2457) (that is compatible with FURY 200A weld cleaning brush)