Lyman Casull Neck Expanding "M-Inchdie (45 Acp/ 45 Win Mag/ 45 Colt/454 )
The Two Step Neck Expanding (M) Die won't stretch cases as does a standard expander button. Extends case life and improves accuracy of reloads. For use with .45 ACP, .45 Mag, .45 Colt, .454 Casull. Standard 7/8 x 14 thread.