Custom-grade rifle dies begin as specially selected steel thats hand-inspected before and after it is delivered. The steel is then heat-treated to ensure the durability needed to provide a lifetime of reloading then the inside surface of each sizing die so smooth, guaranteed to never scratch a case. Before assembly, every part of every die is hand inspected and a protective Titanium Nitride coating is applied to prevent moisture damage during shipping. The result is the most advanced reloading die set available today.