Designed for use with straight-wall rifle and pistol cases, the RCBS .44 Colt 3-Die Carbide Roll Crimp Set eliminates the need for case lubrication and cleaning before sizing and includes a sizer die with a decapping unit, an expander die for expanding and belling the case mouth and a seater die with a roll crimp and a bullet seater plug. RCBS .45 Colt 3-Die Carbide Roll Crimp Set - Reloading at Academy Sports