AGR661-04 – 4″ Abrasive Button-Lock Brush

4″ Abrasive Button-Lock Brush. Use this agressive and abrasive fibered brush with the AGR6XX series brush system to clean round steel, and other rigid types of duct work. The bristles used in this brush out perform flexible steel bristles, and provide an abrasive grit that is embedded in the fiber to scrub into the duct surface. The agressive bristles in this brush are ideal for chewing up hard dryer lint and other duct debris. AGR6XX series brush cores can be refilled with new bristles as they wear, to reduce the cost of on-going operation. With the use an optional adaptor(AGR695), AGR6XX brush head can be used with nylon and fiberglass extension rods.