Lyman's compact Pistol & Revolver E-Zee Case Gauge easily measures, identifies, and sorts case lengths of 18 of the most popular semi-auto pistol and revolver cartridges, from .380 Auto/32 ACP to .460 S&W. Functions as a NO-GO gauge that quickly indicates case length to let you know if a case needs to be trimmed before reloading. Mfg: Lyman