This premium, high-precision reloading component is designed for use in Redding's Type S Neck Sizing Dies and Competition Neck Sizing Dies. Interchanging seamlessly with Wilson-style neck dies, it features a highly polished surface treated with titanium nitride to achieve an exceptional effective surface hardness of approximately Rc85. This ultra-smooth gold coating significantly minimizes friction against your cartridge brass, reducing sizing effort and eliminating the absolute necessity for heavy neck lubrication. Handloaders rely on this .223-inch diameter to achieve precise, consistent neck tension down to the thousandth of an inch, maximizing overall ammunition accuracy.