The EZ Pack securely holds a standard 25-round cardboard shotshell box open, allowing you to quickly drop your freshly loaded shells into their compartments without fumbling. It's the ideal accessory for anyone using a progressive press, turning the tedious chore of boxing up hundreds of rounds into a quick and efficient task. Stop chasing shells around your bench and start packing like a pro. The EZ Pack is a simple, affordable, and indispensable tool for the serious competitive shooter and high-volume enthusiast.