Increase the life of your tires and improve your fuel economy with the help of these easy-to-read tire gauges. Tire gauges will help you make sure that your tires are properly inflated, thus helping you prevent abnormal edge wear. Tire gauge also has a pressure release pin and a pocket clip on the back, and includes 4 replacement valve stem caps. Perfect for keeping in your glove box, and for resale at auto parts stores and gas stations. Case includes 36 Tire Gauges with Valve Stem Caps.