Who wants to spend the money on a progressive press only to sit there and slowly load primer tubes one primer at a time? Progressive presses are designed to load lots of ammunition quickly. That is 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.Features :Works with Large or Small PrimersCircular Auto-Indexing RidgesFlexible Adapter