The RCBS Matchmaster .308 Winchester Competition Neck Bushing Die Set represents the pinnacle of reloading dies with rich features outstanding fit and finish and unbeatable accuracy. Made from case hardened steel with precision-drilled reamed and hand-polished interior surfaces.Neck Size Die Set includes Neck Sizing Die and Bullet Seating DieUtilizes Neck Bushing to Control Neck Tension (Sold Separately)Sizing Die includes Titanium Carbo Nitride Expander for reduced brass build up and smooth case extractionBullet seating window with bullet retention system for safety and precisionLarge Oversize Micrometer for easy adjustments with 0.001" precisionFree-floating self-centering bullet seating stemStandard 7/8"-14 Thread compatibilityLimited Lifetime WarrantyMade in USAPerfect for benchrest and long-range precision shooters who demand exceptional concentricity and bullet tension control. The changeable neck bushing system minimizes brass working to extend case life while delivering astoundingly accurate results.