This product is designed in a die-only configuration, meaning it does not include a shellholder. Users will need to obtain a shellholder separately to use with these dies. Fortunately, these dies are compatible with standard shellholders from well-known manufacturers like Redding, Hornady and RCBS, among others. This compatibility ensures that users have a wide range of options when selecting a shellholder that suits their needs. Precision-ground expander mandrels - each die set includes a 0.002 inches neck tension mandrel, for additional tension increments, utilize our comprehensive mandrel kit Full-length sizing from neck to extractor Mechanism for automated ejection of expended primers in spring-loaded systems Interchangeable high-durability steel decapitation pins for enhanced operational efficiency Precision reamer machined to exact specifications for accurate sizing (eliminates bolt adhesion issues post-second operation) Hydraulic shoulder pressure relief system Manufactured in the United States