The Swage Support Die is designed for compatibility with the Frankford Arsenal X-10 Progressive Press, as well as any other reloading system that utilizes inline swaging. This die offers added convenience for users running multiple X-10 Tool Heads, allowing them to leave the die fully set up on the tool head for quick and easy caliber swaps. Whether you're reloading for different calibers or switching setups frequently, this Swage Support Die helps streamline your reloading process and improves overall efficiency.