Frankford Arsenal Case Prep Power Expansion Kit with Hardened High Speed Steel Large and Small Primer Pocket Uniformer and Crimp Remover for Reloading EASE OF USE: Standard 8-32 threads fits the Case, Trim & Prep Centers auxiliary shaft VERSATILITY: Uniform primer pockets or remove military crimps DURABLE: Constructed of hardened high-speed steel INCLUDES: Large and small primer pocket uniformer/cleaner and large and small primer pocket crimp remover