A JEGS Compression or Leak-Down Tester will allow you to quickly diagnose failed or leaking valves, pistons, rings, and head gaskets through the spark plug, glow plug, or injector ports. Easy-to-read gauges, high PSI capabilities, and adapters for most import and domestic vehicles, these testers are a must addition to your tool arsenal. JEGS 85210 Features: Easy to read 3 in. dual-colored dial gauge. Quick-release fitting on the gauge. Brass adapters included that fit most domestic and import cars and trucks. Includes two quick-test pipes with rubber plugs. Convenient storage and carry case keeps kit organized. For more info, contact www.jegs.com.