Deluxe die sets for bottleneck cases contain three dies. They are a special packaging of our full length die sets with the addition of a neck (NK) sizing die. Series C dies are less popular than the die sets listed in Series A & B. Redding uses the finest alloy steels obtainable. Redding dies are machined on Hardinge Super- Precision lathes capable of holding the tightest tolerances in the industry. This allows Redding to guarantee that they will produce ammunition that will properly fit any standard (SAAMI) chamber, regardless of action type. To maintain tolerances and guarantee that your dies will last a lifetime, all Redding dies are heat treated in atmospherically controlled furnaces. Finally, Redding dies are hand polished for smooth, flawless functioning, go through final inspection, and are ultrasonically cleaned and packaged. The die box is a handy cartridge loading block and storage package. Inside is a spare decapping pin, hex wrench, and even a place for your shellholder! All Redding dies use the industry standard 7/8-14 threaded bodies.