Transform your Lee Carbide Factory Crimp die into the most accurate and easiest to adjust bullet seating die ever made. Simply remove the stock adjusting screw and replace with cartridge specific adapter. You have all these great benefits: Uniform dead length bullet seating Easy crimp adjustment, die is never moved after installation Bullet seating depth is micrometer accurate Cartridge is post-sized after seating and crimping Saves an extra step. Perfect for progressive or turret press users with limited stations. Crimping, seating, and post sizing in one step.