The Redding 6.5mm Stainless Steel Pilot Stop is precision CNC machined from stainless steel for use with Redding Case Neck Gauge and Flash Hole Deburring Tools.Redding 6.5mm Stainless Steel Pilot StopPrecision CNC machined stainless steel constructionCompatible with Redding Case Neck Gauge and Flash Hole Deburring ToolsUnique undercut shape prevents imperfection pickup at case mouthDesigned for smooth accurate indicator readingsProperly fits new and resized case necksEssential reloading accessory for precision handloaders seeking accurate case neck measurements and consistent results in their ammunition preparation process.