The Forster E-Z-Just shell holder priming conversion kit is specifically designed for use with the Forster Co-Axial reloading press, offering a straightforward method for priming cases. This conversion kit includes a shell holder equipped with a pair of jaws that securely clamp onto most rifle and pistol cases commonly used by modern shooters. It is compatible with cases that have a rim thickness ranging from 0.45 to 0.72 inches, ensuring seamless integration with the priming conversion system.