The Vintage RAC Rotating Dial Engine Compression Tester is a classic tool for diagnosing engine issues in gasoline-powered passenger vehicles. With a maximum PSI of 270, this compression tester from Rite Autotronics Corp (RAC) is designed to provide accurate readings for troubleshooting engine performance. Made in Mexico, this untested unit features a rotating dial for easy reading and is a must-have for automotive enthusiasts and mechanics looking to assess engine health.