Maintain your tires two ways with the Accutire Tread Depth Tire Gauge. This amazing machine reads air pressure accurately and provides a precise assessment of your tread depth. It clearly indicates when you tires need to be replaced. The Accutire Tread Depth Tire Gauge reads tire pressure to 99 PSI and displays it on an easy-to-read, extra large screen. This tool also reads tread depth with a built in sensor. Keep your tires in good condition and enjoy driving safely.