Includes the Auto-Prime and nice molded storage box. The Auto-Prime includes small and large priming assemblies, and one folding tray. Holds everything including a complete set of shell holders. This kit comes with 8 of the most popular priming tool shell holders, works with over 130 different cartridges. 1, 2, 3, 4, 5, 11, 12, 19. Holds an additional 10 shell holders. This kit is a convenient way to keep your tool and shell holders all in one spot.