Compression Testing Tool for Cylinders. This digital engine cylinder compression tester kit is designed to efficiently assess the condition of your engine. It includes a precise digital pressure gauge with a measurement range of 10-200 psi, featuring a backlit display for easy visibility. The integrated pressure-hold valve secures the peak pressure, allowing for convenient recording. The kit comes with M10, M12, M14, and M18 adapters, along with straight and angled extension tubes, all neatly stored in a portable carrying case. Compatible with a wide range of gasoline and diesel engines, it aids in evaluating cylinder compression performance effectively.