Why We Need This Tread is the rubber on the tire that touches the road.If it's not deep enough, your car loses traction and suffers extended braking times. To ensure your safety, measure the tread depth as part of your regular vehicle maintenance. Universal Suitable for everyone to measure the depth of tire, no experience or special skills are required. Suitable for various tires of vehicles, like cars, pickups, bikes and motorbike, etc. Material Made of high quality steel, with metal body ensures a long service life. Round dial with pointer design for easy reading. Satisfaction Guarantee .