The Hornady Neck Turn Mandrel is a precision reloading tool designed for 22 caliber cartridges with a .2210 diameter specification for consistent neck turning operations.Hornady Neck Turn Mandrel for 22 Caliber.2210 diameter specification for precise fitSKU: 391910 UPC: 090255919103Essential tool for case preparation and neck turningEngineered for consistent cartridge case neck thicknessPerfect for serious reloaders and competitive shooters who demand precision in their cartridge case preparation for optimal accuracy and performance.