Abstract: An implement combining the functions of a container for storing and transporting tubular interchangeable shotgun chokes, and installing and removing them, is disclosed. The implement includes a hollow cylindrical tube adapted to hold one or more chokes end-to-end. The tube has an externally threaded open end, closable by a thread cap which may be unscrewed to permit inserting or removing a choke from the tube. The opposite end of the tube is closed by a flanged cylindrical boss having a coaxially rearwardly projecting cylindrical body of smaller diameter than the outer diameter of the tube. A castellated ring fitted coaxially over the body of the boss has four axially rearward projecting lugs spaced apart circumferentially at ninety-degree intervals. The common rear annular transverse surface of the lugs is located in a plane forward of the rear transverse wall of the boss.