The Hornady Lock-N-Load .38 Special Cartridge Gauge is a precision reloading tool that allows users to verify their cases and ammunition for proper fit in SAAMI standard chambers.Hornady Lock-N-Load .38 Special Cartridge GaugeChecks cases and loaded ammunition for proper chamber fitEnsures compliance with SAAMI chamber specificationsEssential tool for precision reloadingQuality construction for accurate measurementsPerfect for serious reloaders who demand precision and want to ensure their .38 Special ammunition meets proper chamber specifications for safe and accurate shooting.