This product is a die-only and does not include a shellholder. It is compatible with standard shellholders from manufacturers such as Redding, Hornady and RCBS, among others. Additionally, it is compatible with our Zero modular shellholder system. Following the success of our M-Series sizing die, our objective was to incorporate as many of those industry-leading features as possible into a traditional 7/8 inches die. 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