The Hornady PTX Universal Powder Drop Expander for 45 caliber ammunition provides precise case mouth expansion with 0.451-0.452 inch diameter specifications for optimal reloading performance.Hornady 45 Caliber Powder Through Expander (0.451-0.452'')Compatible with Quick Change Powder Die systemWorks with case-activated powder drop mechanismsEliminates need for separate case mouth expander dieSimple insertion into powder die with powder measure on topDelivers consistent case mouth expansion to desired diameterEssential reloading component for precision ammunition crafting streamlining the powder charging and case expansion process in one efficient operation.