Gorilla Automotive TG1 Pencil Style Tire Pressure Gauge is designed with precision components for an accurate readout. This tire gauge measures pressures between 0-50-PSI. Keeping your car tires properly inflated is an easy maintenance chore that's vital to your safety. To help maintain tires in top condition, use Gorilla Automotive tire-pressure gauges to check the pressure of your tires at least once a month and before starting on any long trip. Protecting the world's finest wheels for over 35 years!