Features: Accurately monitor tire wear and replace tires to ensure driving safety. Using high-precisions aluminum material to ensure measurement error is less than 0.1mm. Solve the problem of inaccurate data caused by deformation of traditional plastic rulers, it is suitable for professional car dealers and individual car owners to regularly check tire wear. Aluminum structures reduce the weight of aluminum products by 50%, weighing only 23g, while doubling their lifespans. No need to worry about corrosion or rusts caused by long time use, suitable for frequent use in outdoor environment, especially for driving enthusiasts. The size is only 90x50mm, making it easy to fit into a toolboxes or glove box. No additional space required, convenient to access at any time, especially suitable for users who need to travel frequently. Essential for mechanic, car enthusiasts, and driver requiring professional tire maintenance tool. Specifications: Material: Aluminum Size:Approx.90mm/3.54''x55mm/2.16'' Package Includes: 1Piece Tire Depth Gauges note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.