The Dillon Steel Rifle 3-die set - Rifle is used for reloading rifle ammunition. This 3-die set includes a sizing/depriming die, a bullet seating die and a crimp die. Dillon dies are designed to work best on Dillon progressive reloading machines. All Dillon dies have standard 7/8"x14tpi threads and the rifle calibre sizing/depriming die has an intergral stuck-case remover designed in! The new 1" lock rings allow a little more space on the tool head (when adjusting the dies) for the 1" wrench to fit. Case lube is required for steel rifle dies.