[INCH/MM Measurements Conversion]: Display can be switched between inches and mm( NO Fractions) [LCD Screen]: Digital depth gauge with large LCD display. [Easy for Operating]: Zero setting at any position, Measuring range: 0-25.4mm [Widely Application]: Suitable for tread depth, brake shoe and pad wear. [Power ON or OFF Button]Manual power on / off,Sturdy plastic housing Difference:0.1mm Colour: Black Material: composite material Product accuracy: 0.01mm Instructions for use: Step 1: Press the power button to turn on the machine and check whether the display is normal. : The allowance for the measurement surface is on a flat surface, push the measuring rod to , 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. 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 Package Contents: 1 * Tire Tread Depth Gauge Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.