The SNAP-ON MT308L Compression Gauge Set is a high-quality diagnostic service tool designed for automotive use. This set includes a quick connector, fittings, carrying case, adaptor hose, o-rings, and regulator, making it a versatile and convenient tool for mechanics and car enthusiasts. With a maximum PSI of 250PSI, this compression tester is precise and reliable for accurately diagnosing engine problems. Made in Mexico, this SET ensures durability and professional performance for all your automotive testing needs.