Like many dial gauges, it holds the reading after you remove it from the tire, with an air pressure relief valve that doubles as a deflator, if a very slow one. It's the largest tire gauge in our ...

Some come with an extension hose, and they are often more feature-laden than pocket-sized gauges with a bleeder valve and dual-scale dial. The Accutire MS-4021B is part of the Tire pressure gauges ...