RCBS 90200 Hand Priming Tool RCBS Product Priming Tools & Accessories Priming Tools And Accessories Seats primers quickly and safely; includes large and small primer plugs Safety mechanism separates the seating operation from the primer supply, virtually eliminating the possibility of tray detonation Fits in your hand for portable primer seating Primer tray installation requires no contact with the primers Uses the same RCBS shell holders (post-1980) as RCBS presses