SIMPLY BETTER AIR. Exclusive Quick Click System Milton's field re-calibratable service gauge is designed for precise measurement and durability. We combined high quality componentry and dial-in accuracy for a long-life and trouble-free Performance. Features a corrosion-resistant chrome-plated brass tubular body and a premium black anodized aluminum indicator bar. An extended-reach chuck and off-set head make it easier to measure tire pressure at almost any angle. A simple hook allows for convenient wall storage. Quick Click Mechanism With a quick click you can easily calibrate your gauge to the desired point just by feel. Simply attach calibration tool to gauge and rotate the stick to adjust - each precise click of the tool equals 0.25 psi calibration Calibrate back to 0. It takes 2 clicks of the calibration tool to revert the gauge back to 0. Specifications: Extended-reach Large Bore Dual Chuck- 2-side aluminum indicator bar, kPa/Bar- Calibrated in three ranges before leaving the factory- Pressure Range: 80 kPa to 1100 kPa (20 kPa increments), 0.8 Bar to 11 Bar Drive Safely: Maintaining proper tire pressures improves vehicle handling, reduces risk of tire failure, improves fuel economy, and increases the life of your tires.