HAND HELD PRIMING: Seats primers by hand so you can feel each one as it goes in. SAFETY SEPARATION: Primer seating is isolated from the primer tray. USES RCBS SHELL HOLDERS: Works with RCBS shell holders used in presses (post‑1980). INCLUDES PRIMER PLUGS: Comes with large and small primer plugs for rifle and pistol brass. MADE IN AMERICA FOR 80 YEARS: All of our products are designed in the U.S. This includes all of our dies, presses, mechanical powder throwers, shell holders, bushings, and more.