As I experienced it, carbide handgun dies became popular during the early 1970s. Many carbide dies were sold individually to reloaders who already had die sets with steel resizing dies. Pacific Dura-Chrome, Lyman, RCBS and probably most other brands' 9 mm carbide sizers had full length tapered carbide inserts. They were more expensive than carbide dies for straight revolver cases. Considering I've been using my Pacific Dura-Chrome and RCBS 9 mm carbide sizers ~ 45 years the extra expense was not much per year. Given a choice I would not buy a single diameter 9 mm carbide sizer.