Case Spinner Stud turns any electric drill into high speed case polisher/lathe and great for holding case for neck turning or trimming Used with the 3-Jaw Chuck 3 Jaw Chuck works with any case from 25 ACP to the monster 460 Weatherby Three hardened steel jaws gently center the case while the spindle locks the case head Cases are installed and removed with a fraction of a turn. For use with the Lee Spinner Stud or Lee Zip Trim Mfg: Lee Precision