Who spends the money on a progressive press to sit there and slowly load primer tubes one primer at a time? Progressive presses are designed to load lots of ammunition quickly. That's why Frankford Arsenal designed the Vibra Prime Automatic Primer Tube Filler. To save time. The Vibra Prime can load 100 primers into a primer tube in a matter of seconds with its unique motorized agitation mechanism. Filled tubes are then easily transferred into any model progressive press tube. A set of simple universal tube adapters and the drop pin ensure efficient transfers. Runs on 2 AA batteries (not included). Includes the Vibra-Prime, 1 Primer Tray, 1 Small Primer Tube, 1 Large Primer Tube and 2 Universal Tube Adaptors. Automatically fills primer tubes in seconds. Compatible with all progressive presses. Works with Large and Small primers.