Full-length die sets for bottleneck cases consist of two essential dies. The Full-Length (FL) resizing die includes a decapping rod assembly with a neck expander (size button), designed to resize the entire case while ensuring proper neck tension for bullet seating. The seating die (ST) is equipped with a bullet guide, built-in crimp ring and the correct seating plug, allowing for precise bullet placement and reliable crimping. This combination of dies ensures accurate case resizing and bullet seating for optimal performance in your reloading process.