This is a pretty cool tool. Heavy and well built. Has a primer catcher and multiple collets for small, med, and large cal cases. You pick the collet that fits around your case, install it into the tool, twist the lid around the collet and case until it holds it in place and then you rotate the base into alignment with the front where the primer pusher and cup are located. Press the trigger and the pin pops the primer into the tube.
Works great. Now I can throw on a movie inside the house and work. Hardly even need to view the work effort. A blind person could operate this tool.
Tips:
Need to keep the tool pointed down or the primers can leak out.
Need to make sure the case is lined up properly in collet or you can push the pin against the case base.
Sometimes the primer holding tube works it’s way out and spills primers and spent powder. Make sure wife does not see this.
Product totally worth its price.