Optimize your reloading setup with this durable black metal primer plug sleeve and spring set. Built for large calibers it ensures smooth and reliable priming performance in your single-stage press. Compatible with most C-frame presses including popular models like the RCBS Rock Chucker and Reloader Special this replacement part is designed to enhance efficiency and precision. The high-quality construction guarantees long-lasting use making it a must-have for any serious reloader.