➜ HEAVY DUTY - steel construction with a FREE gear-style rubber protector, safegaurding your gauge from accidental drops or impact with other tools. This rugged and durable auto tire pressure gauge is built to last! ➜ RELIABLE - features a mechanical tire pressure monitoring system that DOES NOT RELY ON BATTERIES, so it will never let you down and will work perfectly in all weather conditions. ➜ EASY TO USE - 360 degree swivel chuck allows the dial to be viewed at any angle, a handy bleed button allows for accurate tire deflation and a large, high-contrast display ensures clear pressure readings every time. ➜ ACCURATE - order with confidence as this must-have air tire pressure gauge is fully calibrated, tested and accredited to ANSI B40.1 Grade B accuracy standards.