Weiler's Nylox abrasive nylon wheels brushes featuring composite metal hub and composite hub construction are manufactured using a molded polymer material to retain the filaments. In comparison to traditional metal hub construction which folds the fill material around an internal retaining ring or wrap wire, these techniques result in significant increase in fill density and elimination of filament breakage offering the lowest cost-to-use and greatest consistency of performance in production applications. Weiler's Burr-Rx brushes feature Weiler's advanced black ceramic grain filament which delivers up to 400% greater edge cutting action in comparison to traditional silicon carbide and aluminum oxide filaments for the fastest, most aggressive deburring action for minimum cycle times and maximum media life.