RCBS has been making some of the best reloading equipment for over 60 years. These steel, 2-Die sets are known in many reloading circles for their high-quality. Each 2-Die Set includes a full length sizer die has an expander-decapping unit to remove the spent primer while expanding the case mouth. Vent holes prevent case damage caused by trapped air or excessive lubricant. The seater die includes a bullet seater plug and built-in roll or taper crimp as appropriate for the particular cartridge. Shellholders sold separately. Notes 7.62x39mm die set includes expander plug for both 0.308" and 0.311"Image May be Generic and Not Represent Actual Die.