Lightweight and robust construction. Carbon-based probe gauge and base. Fiber composite. Digit size: 7 mm. Total 25 mm. Resolution: 0.01 mm. Accuracy: ± 0.2 mm. 3-button operation: on/off, inch/meter, and zero level. Supplied on a printed blister card with instructions for use and care. Also suitable for brake shoes and pad wear. 3V CR2032 battery. ABS plastic body ABS plastic body, easy to carry, wear-resistant and drop-resistant Accurate Reading Large screen display, intuitive and accurate readings, no crash phenomenon Metal Detector Head Metal detector head, convenient measurement, reliable quality Clear Scale Clear scale, fine workmanship, great appearance Instructions for Use: Press the power button to turn it on, check if the display is normal The measuring surface is close to the flat surface, push the measuring rod to the end, press the ZERO button and it will display 0.00 The measuring surface is vertically close to the tire surface, and the measurement value can be displayed