Weiler 4-1/2" Knot Wire Bevel Brush features a tufted knot end and a saucer shaped radial wheel to provide an aggressive-yet-flexible brushing action for cleaning fillet welds and into corners. Provides heavy-duty brushing action with some flexibility for demanding cleaning applications on somewhat irregular surfaces. Ideal for cleaning filet welds and into corners. 5/8"-11 nut for use on right angle grinders. Weiler's knot wire wheels with a threaded nut are intended for use primarily on small and large right angle grinders. Featuring Weiler's individual knot hole construction, these radial brushes are available in heat-treated Steel wire for use in a wide variety of applications. Weiler uses wire that is harder, stronger, and more resistant to fatigue. We utilize high tensile steel wire that is heat-treated to the most exacting standards for superior fatigue resistance and aggressive brushing. Every lot of wire is inspected and tested to ensure consistency and quality