The Forster Inside Neck Reamer for .224 bullet diameter provides precision case preparation for reloaders eliminating excess brass from case necks that can cause chamber pressure and accuracy issues.Forster Inside Neck Reamer - Model NR1224.224 bullet diameter with precise .226-.2265 rangeMounts in Case Trimmer for accurate brass removalGrinds entire bullet diameter to precision for perfect symmetryConstructed from strong and durable steelDesigned for unsized and untrimmed fired casesEssential for precision reloading this neck reamer helps prevent flyers and improves accuracy by ensuring proper case neck thickness and eliminating excessive chamber pressure caused by thick case walls.