For those of you who want the best in pistol dies consider a Redding Titanium Carbide Set. Titanium Carbide has the highest hardness of any readily available carbide and provides a slick, non-galling surface. The price is a little higher but no lubrication is needed and your cases will glide through the sizing die.
Pro Series Pistol Die Sets are designed for use in progressive reloading machines. The expander die is eliminated from the set and a separate crimp die is substituted. The set includes a carbide sizing die, bullet seater (no crimp type), and a separate crimp die.
Big Book Catalog, Issue:67, Page:515
Sinclair, Issue:4B, Page:042