Weiler 4-1/2" Roughneck Stringer Bead Weld Cleaning Brush is suitable for cleaning root and hot passes and reaching into corners. 5/8"-11 nut for use on right angle grinders. ROUGHNECK STRINGER BEAD WHEELS are the standard for high-performance weld cleaning brushes. Narrow face brushes are suitable for cleaning root and hot passes and reaching into corners. Weiler's stringer bead wheels are the most effective weld cleaning tools for the most demanding users. Our premium weld cleaning brushes are manufactured to the most stringent quality standards, utilizing the highest quality wire available. The twist puts all the sharp tips at the end of the knots, making them the fastest, most aggressive weld cleaning tools on the market. Cleanliness is critical to weld quality. Trust Weiler's trimmed knot design for all your pipeline applications.