The Weiler 3-1/2" Single Row Wire Cup Brush is a high-quality metalworking tool designed for efficient and effective cleaning and deburring of steel surfaces. With a knotted wire design and a threaded arbor for easy mounting, this cup brush offers excellent performance and durability. The .020 wire diameter and 3-1/2 inch brush diameter make it ideal for a variety of industrial applications, while the 5/8 inch arbor hole size ensures a secure fit on most standard arbors. Perfect for CNC machining, metalworking, and manufacturing processes, this steel brush is a reliable choice for professionals in need of a robust and efficient cleaning solution.