The Lyman Stainless Pro 4-Die Set is designed for the tremendous volume of the Mark 7 presses, every aspect of these precision dies was carefully engineered for top performance. Of course, they work great in regular progressive presses as well as turret and single station presses.The first consideration was the material of the dies. The size, seat and crimp dies are all made of stainless steel which was chosen for its toughness and anti-corrosion qualities. No more rusted dies! Pro series sizing dies are equipped with highly polished carbide rings for the ultimate in wear resistance and reduced sizing force. In addition, the sizing dies are equipped with a springloaded decapping rod system to ensure that the primer is forcefully ejected from the primer pocket. Lyman Pro rifle sets get the famous M die neck expander, with its famous two step expander plug for just the right amount of neck tension and case mouth flare. The pistol sets include the flare die which are designed to allow ...