Smart color coded: 3 different colors of areas on the bar show you a clear result of your tyre condition, providing simplicity and convenient for youRange marked clearly: red range on bar: 0 - 3/ 32; Yellow range on bar: 3/ 32 - 6/ 32; Green range on bar: 6/ 32 - 32/ 32; These clear and accurate markings allow for easy and fast readingEasy and convenient to use: this tire gauge is an efficient tool to monitor tire tread levels; And you can use it in a cost-saving way without chargingPortable depth measuring gauge: the tire gauge is approx. 3.35 x 1.06 inch in size; It features a pocket clip for easy carrying, you can clip it on your pocket, good for quick and convenient applicationQuantity: you will get 10 pack tyre thread depth gauges in the package, enough for your spare and replacement in daily life; You can also send some to your family and friendsSpecification:Material: metal, plasticTotal length: about 3.35 inch/ 8.5 cmBarrel diameter: about 0.4 inch/ 1 cmPlastic end (L x W): about 1.1 x 0.4 inch/ 2.7 x 1 cm