The KleenBore 12 Gauge Chamber Mate Cleaning Tool is great for cleaning powder fouling and plastic from chambers and choke area. The heavy-duty phosphor bronze brush with its tapered nose is made to fit these difficult-to-clean areas. Have you ever tried to clean those little holes they call muzzle ports. This tool does it quickly, from the inside out. The Chamber Mate is a rugged tool with a strong aluminum rod and sure grip handle.