The RCBS Full Length Die Set consists of a Full-Length Sizer Die with an Expander-Decapping Unit, and a Seater Die with Bullet Seater Plug. The Full-Length Sizer Die brings the case to SAAMI minimum cartridge dimensions. This die sizes the outside of the case, de-primes, and expands the neck to accept the bullet. The die has vents to prevent case damage caused by trapped air and excessive lubricant. Headspace is held to minimum tolerances to avoid changing the case body length during full-length sizing.Specifications and Features: Cartridge Caliber: 6.8 Western Full-Length Sizing Die with Expander-Decapping Unit Bullet Seater Die with Bullet Seater Plug Seater Die Has a Built-In Roll Crimper Standard 7/8"-14 Thread Proprietary Die Steel Integrated Vents to Prevent Damage Brings Cases to SAAMI Minimum Cartridge Dimensions Green Die Box