The RCBS 90200 is a hand priming tool that provides a quick and secure method for seating primers. Its standout attribute is its safety mechanism, which is patented and designed to separate the seating operation from the primer supply. This virtually nullifies the risk of tray detonation, ensuring your safety during use.This tool is compact enough to fit comfortably in your hand, optimizing its portability. Additionally, the installation of this primer tray avoids any need for direct contact with the primers, enhancing its safety features even further.The RCBS 90200 Hand Priming Tool is compatible with the same RCBS shell holders (post-1980) as RCBS presses, ensuring convenient and versatile application. Constructed from durable cast metal, it ensures long-lasting resilience. Included with the tool are large and small primer plugs for your varied needs.