[DETAIL] Instructions for use: Step 1: Press the power button to turn on the machine and check whether the display is normal. Step 2: The allowance for the measurement surface is on a flat surface, push the measuring rod to the end, press Zero to return to "0.00" Step 3: The measurement surface is vertically close to the tire surface. Insert the measurement rod into the bottom of the groove to display the measurement value. Product information: Product range: 0-25.4mm Difference:±0.1mm Material: ABS plastic Net product amount: about 40g Product accuracy: 0.01mm Tire pattern depth ruler: Tire wear limit value ≤1.6mm Recommended replacement Summer tire driving wear ≤3mm Recommended replacement Winter tire driving wear ≤ 4mm Recommended replacement Note: It is recommended to measure several times in different areas of the same tire and take the average value, the result is more accurate. [ATTRIBUTES] - Hign-concerned Chemical: None - Origin: Mainland China - Hign-concerned Chemical: None - Origin: Mainland China