The NR1458 Inside Neck Reamer is a precision reloading tool designed with a 0.4605" inside diameter for accurate brass case preparation and neck uniformity.Model NR1458 Inside Neck Reamer0.4605" precise inside diameter specificationProfessional-grade reloading toolDesigned for brass case neck preparationEnsures consistent neck wall thicknessEssential for serious reloaders seeking optimal accuracy and consistency in their ammunition preparation process.