The Forster Inside Neck Reamer is a precision reloading tool designed for .452 bullet diameter cartridges with neck diameter specifications of .454-.4545 inches.Forster Inside Neck Reamer Model NR1452.452 bullet diameter specificationNeck diameter range: .454-.4545 inchesPrecision machined for accurate case preparationEssential tool for cartridge reloading and case neck uniformityIdeal for reloaders seeking consistent neck tension and improved accuracy through proper case preparation and neck diameter standardization.