Lyman carbide pro trim dies are engineered for durability and efficiency, featuring super slick carbide inserts that ensure long-lasting performance. Crafted in the USA to meet Lyman's rigorous standards, these dies boast stainless steel bodies with a 7/8-14 threading compatible with all standard machines. The top thread, sized at 13/16-20, is designed for seamless integration with Lyman's power trim Xpress and other popular press-mounted trimmers. The interior carbide inserts are highly polished to withstand a lifetime of heavy use, making them ideal for both high-volume shooters and commercial loaders seeking a smooth and efficient trimming operation.