Wolverine 4″ stringer bead twist knot wire wheel brush is suitable for cleaning root and hot passes and reaching into corners. Engineered for cost effective use in less demanding applications. 5/8-11 nut for use on right angle grinders. Narrow face brushes are suitable for cleaning root and hot passes and reaching into corners. They have been engineered for cost effective use in less demanding applications. Engineered for cost-effective use in less demanding applications. Using similar product construction and to the same exacting standards as other Weiler weld cleaning brushes.