The Redding Neck Sizing Dies are expertly designed to size only the necks of your bottleneck cases, helping to extend the life of your brass and improve overall accuracy. Since these dies do not resize the shoulder or body of the case, it is critical that fired cases are not interchanged between rifles. This makes them especially ideal for cartridges used in bolt-action rifles, where precision is key. Crafted from the finest alloy steels available, these dies are machined on Hardinge Super-Precision lathes to hold the tightest tolerances in the industry. They are heat-treated in atmospherically controlled furnaces and hand-polished for flawless, smooth operation. Built to maintain tight tolerances and offer lasting performance, these dies are designed to last a lifetime. Each die is thoroughly inspected and ultrasonically cleaned before packaging, ensuring it meets the highest standards of quality and reliability.