The Hornady sure-loclock rings are designed to provide rock-solid stability by clamping around the entire die, applying consistent pressure to keep the ring securely in place. Unlike traditional locking rings, the locking screw on the Sure-Loclock does not come into contact with the threads, eliminating the risk of damage from pliers and ensuring a reliable, damage-free hold. Perfect for reloaders seeking superior performance and longevity from their equipment.