The RCBS Case Neck Turner is a precision reloading tool designed for fast easy removal of excessive neck thickness and variation in cartridge case thickness with simultaneous inside and outside turning.RCBS Case Neck Turner reloading toolTwo-tool system for comprehensive neck preparationSpecial pilot/reamer supports and guides the cutterSimultaneous inside and outside neck turning capabilityWorks with sized cartridge case necksNote: Not compatible with Trim Pro Power Case TrimmerEssential for precision reloaders seeking consistent case neck thickness and improved accuracy in their handloaded ammunition.