The SNAP-ON MT308L Compression Gauge Set is a high-quality diagnostic tool designed for automotive use. It includes a quick connector, fittings, carrying case, adaptor hose, o-rings, and regulator, providing everything needed for accurate compression testing. With a maximum PSI of 250, this compression tester is reliable and efficient, making it a must-have for mechanics and car enthusiasts looking to ensure optimal engine performance. Crafted by the trusted brand SNAP-ON and manufactured in Mexico, this compression gauge set is a durable and essential addition to any automotive tool collection.