Choke & Chamber Tool for Shotguns.Excellent for use in Side-by-Side and Over-and-Under Shotguns. One of the most sought after accessories ever sold at the Grand American Trap Shoot with a Payne Galloway chamber brush combination!! This Quality American Made ALL Brass tool should be used with Pro Shot Shotgun Chamber brushes. Great for using with your chamber brush in chambers and the screw in choke area.