The new Auto-Prime XR eliminates the primer brand restriction so any brand primer is now usable. The new Auto-Prime XR features a patent pending elevator pin. This pin safely separates a single primer from the others and presents it for priming, reducing the likelihood of a chain fire. The new tool also has a new unbreakable comfort curve lever. Comes with both, large and small primer trays with slide on covers that comfortably accepts all brands of primer boxes. Built-in primer flipper turns them right side up. Simply dump the primers into the tray, shake lightly, replace cover and you’re ready to prime. Uses Auto Prime shellholders only (sold separately).