Hornady New Dimension I Two-Die Sets for 7mm Remington Mag are two exceptional sets of handgun gun dies that will take your personal ammunition handling and gunsmithing to a whole new level. Manufactured to the exacting standards of the legendary Hornady brand, this unique set of gunsmith and gunsmithing dies includes a split spindle design as well as an internal smoothing device and a unique self-centering expander. The Hornady New Dimension I 7mm Remington Mag Two Die Set boasts an all-new bullet seating system that will greatly improve the accuracy and function of your press. This two piece set of gunsmith and reloading dies will take your gun from a slug press to a self-centering two-die set. This is accomplished by making use of the benchrest precision of the Hornady Sliding Ball Expander, a device that does not expand the case as it swells. The elliptical shape of the Hornady New Dimension die expander significantly reduces friction and case neck stretch - ideal for bottleneck rifles, handguns, or CNC machines. For a two-piece gunsmith die set, make sure you get the Hornady New Dimension 7mm Remington Mag Two Die Set.