Wilson Combat Chamber Cleaning Tool .45 ACP. Unfortunately your .38 or 9mm bore brush is the wrong diameter and usually too soft to remove chamber contamination.; You need a Wilson "Chamber Cleaning Tool". This tough little tool has a sturdy Delrin handle and very stiff stainless bristles to thoroughly clean your chamber. If you own a .38 Super or 9mm handgun you need this little tool. Stainless brush is hard enough to remove stubborn fouling without damaging your barrel.; Specifications for Wilson Combat Chamber Cleaning Tool: Manufacturer: Wilson Combat Caliber: .45 ACP Gun Type: Pistol Package Contents: Wilson Combat Chamber Cleaning Tool Wilson Combat 803-45: Chamber Cleaning Tool .45 ACP