Tire Depth Gauges The large LED display is clear and easy to read. Tire Depth Gauges measuring range is 0-25.4mm, digital display and accuracy 0.01mm. The metric system and the imperial system can be converted, which is more convenient to use. Measured value reference: 1. Tire wear limit value 1.6 mm. It is recommended to replace. 2. Frequently drive at high speed and the measured value is less than or equal to 3mm. It is recommended to replace. 3. Frequent driving in rainy and snowy weather, measured value 4mm. It is recommended to replace. 1. Power up. Check if the display is normal. 2. The measuring surface is firmly attached to a flat surface, push the rod all the way in, press the "zero" key to clear it, and it will display 0.00. 3. The measurement surface is close to the tire surface vertically, and the metal probe is inserted into the bottom of the pattern groove to display the measured value. 4. It is recommended to measure several times and take the average value. Product details: Material: ABS plastic The color: black Measuring range: 0-25.4mm Resolution: 0.01mm Net weight: 50g Product size: 11.5 x 6 x 1.5 Product packaging: sealed bag Package: 1 x Tire Depth Gauges