Hornady's Custom Grade New Dimension dies are created from select steel that's heat-treated to ensure the durability needed for a lifetime of reloading. Hornady guarantees they'll never wear out or break under normal use. All dies include the popular double-flat Hornady die lock rings installed and a custom plastic box. Hornady dies are grouped in three series for pricing - die construction and quality is equal in each series. Custom Grade Seater dies include a sliding alignment sleeve which holds the bullet, case mouth, and seater stem in alignment before the bullet enters the case mouth. Seater dies include a built-in crimp ring which can be used or raised for no crimp. All Mfg: Hornady