These dies size only the necks of your bottleneck cases to prolong brass like and improve accuracy. It is important that fired cases should never be interchanged between rifles since the neck sizing dies do not size the shoulder or body. Available individually or in Neck Die Sets and Deluxe Die Sets.
Big Book Catalog, Issue:67, Page:516
Sinclair, Issue:4B, Page:040
Sinclair, Issue:4B, Page:041