The development of these dies was inspired by the overwhelming success of our M-series sizing die. The M-series has set a high standard in the industry and we aimed to incorporate as many of its leading features as possible into this traditional 7/8 die. This approach ensures that users benefit from the advanced technology and design principles that have made the M-series a favorite among enthusiasts. 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