The RCBS Neck Sizer Die is a vital tool for shooting enthusiasts who take reloading seriously. It's an integral part of any reloader's bench, boasting a full-length die set that ensures precision and long-lasting durability. The set is machined from proprietary die steel, which resizes cases to SAAMI minimum dimensions for consistent, reliable performance. It features an expander-decaping unit that simplifies the de-priming process and expands the neck to accept bullets. Additionally, the vented die design helps prevent case damage from trapped air or excess lubricant. Not to be overlooked, the seater die includes a built-in roll crimper to securely seat bullets. With standard 7/8"-14 threading, it is compatible with most reloading presses.