This complete Equus Model #3030 10 Function bench analyzer works for 4/6/8 cylinder motors c/w Equus dual beam xenon timing light, Equus Compression tester, Equus Vacuum/Fuel pump tester, Equus engine bump starter. Battery Hydrometer and antifreeze testers. spark plug # tool 1-8 c/w all original manuals. This would suit the hobby mechanic or someone just starting out in the old car hobby. You won't be sorry you bought this set up.