LEE PRECISION 90608, Zip Trim Case Trimmer Universal 3 Jaw Chuck Case Holder Fits: lee zip trim case Trimmer or lee case Spinner stud (both sold separately) Function: hold and center brass while it is being squared to the cutter Material: steel Works with any case from 25 ACP (base diameter .278") to the monster 460 Weatherby (base diameter .582") Cases are installed and removed with a fraction of a turn. For use with the Spinner Stud (90607) or Zip Trim (90899) For use with the Spinner Stud (90607) or Zip Trim (90899)