Keeping your tires properly inflated can increase tire life, improve gas mileage, and provide a smooth comfortable ride. Use these professional grade tire gauges to monitor tire pressure with ease and confidence. The analog dial is easy to read, measures from 0 to 150 psi., and is calibrated for PSI and kPa readings. A bleeder valve is built-in to hold the pressure until released, and the shock resistant rubber housing provides exceptional durability. This Pro-Grade tire gauge with rigid steel design includes dual heads to fit virtually any application. For use on all aluminum semi-truck and trailer wheels, recreational vehicles, cars, vans and busses. Manufacturer's lifetime guarantee included.