A professional tool worth having, UNIVERSAL FIT CARS AND TRUCKS Protect your vehicle Save your FUEL cost Enhance your driving ability The key reason should be repeated three times Keep you and your family safer,Keep you and your family safer,Keep you and your family safer 1. Push the measuring scale into the gauge as far as it will go. 2. Place the probe into the center of a circumferential tire groove and push down on the gauge's base. 3. Carefully remove gauge by holding its barrel (without touching the probe) and confirm the tread depth reading. 4. Place the probe into additional locations around the central circumferential tire groove at least 15 inches apart and repeat. 5. Place the probe into the inner and outer circumferential grooves and repeat. 6. Average all readings. 7. Identify the percentage of tire wear by confirming the tire's original/new tread depth in its specs compared to the remaining tread depth just measured. 8. If uneven tire wear is identified, have vehicle checked by a reputable tire specialist. The Tire Thread Depth Gauge is divided into Red,Yellow,Green ranges， Red：Dangerous Tire，need to be replaced, Yellow:Warning Tire,be careful when driving, need to be replaced when snowstorm,raining, Green: Safe tire The tire tread gauge calibrated from 0 to 1 inch, reads in 32nds, and three color zones. Red range on bar: 0-3/32nds; Yellow Range on bar: 3/32 - 6/32nds ; Green Range on bar: 6/32-32/32nds, which provides accurate depth readings and allows for a quick and easy reading, Once you tried, you will be making an investment of a lifetime! The car tire thread gauge has a small size with a metal pocket clip; It can be not only easy to clip on your pocket but also can be put into any tool case even though just very samll space left. This tire thread measure tool are are composed of a chrome-plated metal barrel,plasitc bar,pocket clip and metal probe with damping sliding design.Very durable and delicate! The tyre tread depth gauge is suitable for cars,trucks, motorcycles, bus and any passenger vehicle. if you have it ,you can regularly monitor tire tread levels of your car to ensure safe driving