12 Gauge Chamber Brush Pro-Shot's 12 Ga. Chamber Brush is excellent for removing plastic from your shotgun chamber. The premium chamber brush has a full fill of bristles. Pair the 12 Ga. Chamber Brush with the Pro-Shot rass chamber tool Item# CH Tool with this brush for an excellent chamber/choke tool set. The Payne Galloway style brush is made to rotate 360 degrees in the chamber for fast & easy chamber cleaning. For use in Over and Under, Side by Side,and Single Barrel Guns.