This product comes in use to measure the exact pressure of your car tires. This digital tire pressure gauge shows the mass rate of the tires. They are very easy to use and read. Its design represents a strong ABS shell with a power button to turn on and off. It is small and can be stored in any place. It is fastened to a keychain with a hook. This product is meant to serve two purposes, with the tire gage showing the right air pressure and a keychain to safely hold your keys.