Unlike hand-held neck turners that are centered only on the pilot, the Forster Outside Neck Turner turns your case neck concentric to its true axis. This unit produces neck walls of uniform thickness and exact outside neck diameter. Features a circular carbide cutter. Designed to be used after the neck has been resized and expanded. For use with the Forster Case Trimmer (sold separately). Note: Cases longer than .375 Magnum (2.94") require a long case trimmer base (sold separately).