Manufactured by United Abrasives, these circular flared crimped end brushes are designed for robust cleaning and finishing tasks on various ferrous metals, including iron, steel, and cast iron. With a diameter of 1-1/2 inches and a wire size of .012 inches, they are optimized for aggressive cutting action thanks to the knot wire design, making them ideal for removing rust and cleaning recessed areas or pipes. Their high flexibility, provided by the crimped wire, allows for effective side cleaning, ensuring that even the most intricate surfaces can be adequately maintained. Compatible with portable power tools and rated for a maximum RPM of 20,000, these brushes come in a convenient 12-pack, ensuring that you have the right tool at hand for any project that requires detailed metalwork.