This 0.2390" Inside Neck Reamer is a precision tool designed for ammunition reloading applications providing accurate inside neck diameter reaming for consistent cartridge preparation.0.2390" Inside Neck Reamer (Model NR1239)Precision-machined for accurate inside diameter reamingEssential tool for cartridge case neck preparationProfessional-grade construction for consistent resultsIdeal for serious reloaders and gunsmiths who demand precise neck dimensions for optimal ammunition performance and accuracy.