Check compression on most domestic and foreign diesel engines, this compression tester reads pressure from 0-1000 PSI. Featuring a quick-connect adapter, gauge and a thumb button air release, this compression tester comes with adapters for GM, Ford, Lincoln, Isuzu, Mercedes Benz, Kubota, Toyota, Volkswagen, Peugeot. Quick-connect adapter Reads pressure from 0-1000 PSI 2-9/16 in. diameter gauge Thumb button air release