The Redding 25 Caliber Stainless Steel Pilot Stop is precision CNC machined from stainless steel for use with Redding Case Neck Gauge and Flash Hole Deburring Tools.Redding 25 Caliber Stainless Steel Pilot StopPrecision CNC machined stainless steel constructionDesigned for new and resized case necksUnique slightly undercut shape prevents imperfection pickupCompatible with case mouth and neck/shoulder junction measurementsWorks with standard 3/16" mandrelsCompatible with other manufacturers' toolsEssential for reloaders seeking smooth accurate indicator readings when measuring case necks. The precision engineering ensures reliable performance for both novice and experienced handloaders working with 25 caliber cartridges.