Lee Priming Tool Kit & Shell Holders Includes the New Auto-Prime and molded storage box. 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.