vintage Snap On compression guage with pressure relief button
The vintage Snap-On compression gauge designed for automotive use. Made by Snap-On Tools Corp in Kenosha, Wisconsin, this compression tester features a pressure release button for added convenience. Max pressure of 200 PSI, it is untested with some surface rust on back as pictured, glass is clear with no fogging as pictured, cylinder nipple is in near perfect condition. The pressure relief button works great, no sticking or forced pressure, very easy to press.