Easily convert your MEC 600 Jr. Mark 5 to load 10, 12, 16, 20, 28 Gauge or .410 Bore with this all-in-one reloading die kit. Made from high-quality components and backed by a brand known for reloading reliability, this kit includes everything: KO bushing, punches, resize ring, crimp heads, wad guide, shell holder, drop tube and full instructions. Affordable. Durable. MEC trusted. Die set upgrades your reloader to 16 gauge for added versatility