Frankford Arsenal Case Prep Expansion Kit -The primer pocket uniformer tools will replace dulled or lost cutters to bring your brass preparation operation back up to full speed. Specially designed military crimp removal cutters make quick work of any NATO spec brass. Made of hardened high speed steel, these cutters will prep thousands of cases with ease. Made of hardened high speed steel (HSS)Large and small primer pocket uniformer/cleanerLarge and small primer pocket crimp removerStandard 8-32 threads fits Case Trim and Prep Centers auxiliary shafts