The Redding 7mm Stainless Steel Pilot Stop is precision CNC machined from stainless steel for use with Redding Case Neck Gauge and Flash Hole Deburring Tools.Redding 7mm Stainless Steel Pilot StopPrecision CNC machined stainless steel constructionDesigned for new and resized case necksUnique undercut shape prevents picking up case mouth imperfectionsEnsures smooth accurate indicator readings with Case Neck GaugeCompatible with standard 3/16" mandrelsEssential for precision reloaders seeking accurate case neck measurements and consistent ammunition preparation. The specialized undercut design eliminates interference from neck/shoulder junction irregularities for reliable gauge readings.