RCBS 22115 Carbide Die Set, .40 S&W/10MM auto Made of the highest quality materials Hunting reloading dies Another quality Bushnell product Carbide Die Sets consist of a Carbide Sizer Die, Seater Die, and Bullet Seater Plug Made from case hardened steel Precision-drilled and reamed to the same exacting standards as the finest gun mechanisms Full-Length Sizer Dies for bottleneck cases have vents to prevent case damage Properly hardened and hand polished