Product details:

Locates internal engine problems such as bad rings, valves and leaking head gaskets Includes adapters for most applications (10mm, 12mm and 18mm) Rugged blow-molded case Stanley JFP210M Proto Differential Cylinder Pressure Tester Locates internal engine problems such as bad rings, valves and leaking head gaskets. Includes adapters for most applications (10mm, 12mm and 18mm). Rugged blow-molded case.