Lyman Neck Expanding "M-Inchdie (Arg Mauser, 303 British) (7.65-mm)
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 .303 British, 7.65mm Arg. Mauser. Standard 7/8 x 14 thread.