Neck die sets for bottleneck cases are designed to provide precision and reliability in your reloading process. These sets consist of two high-quality dies, each crafted to meet specific needs. The neck resizing die (NK) includes a decapping rod assembly with a neck expander, also known as a size button, to ensure your cases are resized accurately for a perfect fit. The seating die (ST) is equipped with a bullet guide and a built-in crimp ring to provide consistent bullet seating and proper crimping. Additionally, the correct seating plug is included to guarantee that each round is seated to the desired depth with precision. This combination of features makes neck die sets an essential tool for reloaders who demand top-tier performance and consistency.