The Hornady Lock-N-Load Primer Pocket Swage Tool is specifically designed for 223/5.56 NATO cartridge cases providing a clean and efficient method to remove primer pocket crimps.Hornady Lock-N-Load 223/5.56 NATO Swage ToolSingle stage operation for precise controlAdjustable swage depth to accommodate various case brandsSwaging process eliminates cutting trimmings and messQuick and clean crimp removalEssential for reloaders working with military brass this tool ensures proper primer pocket preparation while maintaining case integrity through the swaging process rather than destructive cutting methods.