This deluxe set tests all fuel injection systems, both foreign and domestic. It features two gauges with gauge protectors for accurate testing from 5-140 PSI. All gauges, hoses and adapters are fully quick, disconnect for fast and easy connections. It includes a large 3-1/2 inch gauge with dual reading of 0-145 PSI and 0-1,000 Kpa and a low pressure 2-1/2 inch gauge for an accurate reading below 15 PSI. All adapters, gauge and hose assemblies feature a quick coupling system for speedy and efficient testing connection.