The Michelin Digital Tire Gauge with Tread Depth Indicator provides an easy-to-read LCD display and a durable copper nozzle. The digital tire depth gauge allows you to check the tread on your tires to ensure you are always driving tires with enough tread for safety. It's operating range is 5-99 PSI and is accurate to +/- 1 psi. Great for cars, trucks, motorcycles and bicycles.