Weiler Wheel Brush, 4 in Brush Dia, 1/2 in Face Width, Standard/Twist Knot Filament/Wire Type, 0.014 in Filament/Wire Diameter, Carbon Steel Fill, 7/8 in Trim Length, 20000 rpm Maximum, Stem Attachment, 1/4 in Shank Dia. Weiler 4" Stem-Mounted Knot Wire Wheel provides a heavy-duty brushing action with some flexibility for demanding deburring applications on steel. The permanently-attached 1/4-inch stem is intended for use on CNC/milling/automatic machines, die grinders, drills, drill presses, right angle die grinders and straight grinders. 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.