Premium twist knot wire cup brush with bridle. Ideal for heavy-duty cleaning of metal surfaces. Used to remove rust, scale, paint or other adherences on flat or irregular surfaces. Made from high carbon tempered steel and each tuft is perfectly positioned and set for perfect balance and optimum performance. Patented nut design has gripping points and raised nut making it easier to tighten and loosen on and off angle grinders. Equipped with metal bridle to eliminate flaring for easier control when brushing. When wire is worn to the metal bridle, it can be knocked off by a hammer blow exposing more wire for 30 percent longer life.