3 in Crimped Wire Cup Brush,Use for light surface cleaning, rust and paint removal, etc on aluminum and stainless steels 3 in. crimped steel wire cup brush is a great tool for fast heavy duty cleaning and polishing. Excellent for deburring and removing paint, rust and scale from steel surfaces. Use with angle grinders is recommended. Great for preparing metal surfaces for painting,Crimped wire is less likely to scratch surfaces Safety supporting ring controls flaring to extend brush life. Once wires are worn down to the ring, the ring can be removed to expose more wire for extra brush life Constructed of high performance wire,Compatible with a wide variety of grinders