Designed for use with straight-wall rifle and pistol cases, the RCBS 9mm Luger/9 x 21/.356 TSW/9 x 23 Win/9 x 18 Ultra 3-Die Carbide Taper 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 taper crimp and a bullet seater plug. RCBS 9mm Luger/9 x 21/.356 TSW/9 x 23 Win/9 x 18 Ultra 3-Die Carbide Taper Crimp Set - Reloading at Academy Sports