The 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 stringent 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. Inside, the highly polished carbide inserts are built to withstand a lifetime of heavy use, making them ideal for both high-volume shooters and commercial loaders. These dies enhance your trimming operations, ensuring smooth and efficient performance.