The Snap On Mt37a Oil Pressure Gauge with Case is a reliable and high-quality pressure tester specifically designed for gasoline engines in passenger vehicles. It features a dual scale range with a maximum PSI of 100, making it suitable for detecting engine combustion leaks. This product comes with fittings as accessories and is a valuable tool for automotive maintenance and troubleshooting. While it does not come with a warranty, the Snap On brand ensures durability and accuracy in measuring oil pressure levels.