Hornady Custom Grade New Dimension Nitride 4-Die Set Seating die features seater adjustment screw, built-in crimper, and locking retainer spring The crimp die and is intended for a deep crimp which may be required with heavy cast bullet loads. Features Hornady's No-Risk Lifetime Warranty Hornady Suggests Spraying all metal parts with Hornady One Shot Gun Cleaner-Degreaser and Dry Lubric