Lee's primer attachment is used for conversion to a different primer size for the pro 1000 press.Includes a large and small troughs, primer pins, spring and a folding primer tray.Capacity: 100 PrimersType: Pro 1000 Primer AttachmentCaliber: Multi-CaliberSize: Sm/Lg PrimersQuantity: 1Weight: 0.48 lbsFunction: Converts Primer SizeCompatible With: Pro 1000 PressMaterial: PlasticIncludes: Large & Small Primer TraysFinish: Clear/BlackMedia Type: Primers