The RCBS 3-Die Set has a sizer die with decapping unit, an expander die and a seater die with crimp. Cases must be lubed prior to sizing. Shell holder sold separately. Includes Sizer Die (with decapping unit), Expander Die (for expanding and belling case mouth), and Seater Die (with roll crimp). Does not feature a carbide sizing ring (cases must be lubed prior to sizing). For use with 44-40 WCF.