RCBS 5-Station Shell Plates properly align the case with the reloading die during reloading. They're built from hardened steel and capture 0.125-inch of the case head for proper SAAMI headspacing. They feature five stations and are for use on PiggyBack, PiggyBack 2, PiggyBack 3, PiggyBack 4, AmmoMaster Auto, Pro 2000 and Pro 2000 Auto progressive presses