The Lyman 7.62x39mm Magnum 2-Die Set is crafted on state of the art computer controlled equipment insuring that each die is perfectly dimensioned. Each rifle sizing die is vented to prevent trapped air that can damage cartridge cases, polished, heat treated for toughness and then receives a final micro-finish polish for extra smoothness. Lyman 2 die rifle sets are perfect for loading jacketed bullets in bottleneck cases. It includes full length sizing die and bullet seating die with a roll crimp. It also has 7/8"-14 threads to fit all popular presses.