Weiler Mini Roughneck Wheel Brush, Narrow Face, 4 in Brush Dia, 3/16 in Face Width, 3/8-24 Arbor Hole Size, Stringer Bead Knot Filament/Wire Type, 0.02 in Filament/Wire Diameter, Steel Fill, 7/8 in Trim Length, 20000 rpm Maximum, Threaded Arbor Attachment. Our premium weld cleaning brushes are designed and manufactured to the most stringent quality standards in the industry. Weiler stringer bead wheels utilize the highest quality wire available and feature a twist that puts all of the sharp tips at the very end of the knots, making them the fastest, most aggressive weld cleaning tools on the market. At Weiler, we passionately embrace change to improve our products and our processes to move the company and our customers forward. By bringing new ideas and creative problem solving together in an open, collaborative environment, we will improve our customers' productivity and create profitable growth. Weiler Abrasives is eager to create a collaborative partnership to overcome your toughest cleaning, grinding, cutting, de-burring and finishing challenges. Weiler manufactures precision brushes, abrasives, and maintenance products. The company was founded in 1898 in Germany, is headquartered in Cresco, PA, and is International Organization for Standardization (ISO) 9001 certified.