A measurement tool to ensure that crimps made by a swage tool are being made properly. Each is unique to the tool, and cannot be interchanged. Swaging Tools http://www.i-weiss.com/rigging/suspension/wracc.html Kids, everyone, sing this little ditty with me. Get yourself the proper gauge, Before you make another swage. For if it isn't on the page, It ain't on the stage.* And that's how I met your mother. *From one of the original stage managers, when speaking of the A Chorus Line bible, aka "How to reproduce the show, so every national company and bus & truck tour looks exactly as Michael Bennett intended."