High Pressure Applications. For aircraft tires. Inflates, deflates, and gauges. Screw type-locking chuck part number 9043, securely attaches to valve. Inflate through side inlet tank valve. Drain the bleeder hose for pressure. Gauge is accurate to within ±2% / ±1% / ±2% of total dial range (Grade A). 5psi increments. Comes complete with extensions 331, 349 and 356. Recalibration screw to permit adjustments.