This 2-Die Set is designed for reloading bottleneck cases and includes a Full-Length Sizer Die with an Expander-Decapping Unit and a Seater Die with a Bullet Seater Plug. The Full-Length Sizer Die ensures the case meets SAAMI minimum cartridge dimensions, resizing the case, de-priming and expanding the neck to securely accept the bullet. The die features vents that help prevent case damage from trapped air and excessive lubricant. Headspace is precisely controlled to avoid altering the case body length during full-length sizing. The included Seater Die is equipped with a built-in roll crimper, which securely crimps the bullet while seating it for optimal performance. This set is perfect for achieving accurate, consistent reloads for bottleneck cartridges.