ANCHOR 4" Knot Wheel Brush (Part 102-R4K58 / Model R4K58) is a crimped-wire, carbon steel abrasive wheel designed for aggressive cleaning, deburring and surface finishing on metal components. The knot wheel design provides stiff, durable wire knots for long life and consistent material removal. Features a 5/8-11 arbor for common bench and hand-held tool mounting. Product dimensions are approximately 7.5 x 5.3 x 1.3 inches and it ships as a single unit. Made in US. Manufacturer: ORS NASCO (Brand: Anchor). Ideal for industrial and maintenance applications where a robust, carbon-steel abrasive brush is required.