The clamp holding the case is easy to use but creates eccentricity. This tool has the serious potential to ruin your brass.
The tolerances are sloppy and the design in general is poor. Try one before buying it. I have stopped using mine as the results are um predictable and not consistent. Good brass is way too expensive to ruin.
Pros: It is fast to use once set up
Cons: Cumbersome adjustments poor results
This review was written in the old system and had content requirements that are different than reviews written today.