The NEW Lee Auto Prime hand priming tool is a fast, safe, and effective way of priming cases. Also recommended for priming the VariFlame II primer holders for muzzle loaders. Lee Auto Prime uses inexpensive Lee Hand Prime shell holders only (see below). Accepts Large and Small Rifle and Pistol primers from all manufacturers. Uses inexpensive Priming Tool Shell Holders (sold separately)Works with any brand of primers (large and small)Comfort Curve LeverNew Folding Tray with Built In Primer Flipper (works with largest primer boxes).