The e-zee prime works with any popular brand of standard shell holder and allows instant changeover between primer sizes.It includes two primer trays, each of which incorporate their own built-in large or small primer punch assembly.There are no small parts to fuss with or lose.Each tray has a built-in shut-off gate to keep primers in place during change-over.The reloader simply removes the snap-in-place lock collar and installs the correct size primer tray and the shell holder as needed.Then, the lock collar is snapped in place and the change-over is complete.The primer trays also function as a primer flipper to properly orient primers for seating.The comfortable ergonomic design optimizes leverage to reduce hand fatigue.Type: Hand Priming ToolCaliber: Multi-CaliberSize: 2 lbsQuantity: 1Weight: 2 lbsFunction: Priming ToolIncludes: Large & Small Primer Trays