Information:-Product range: 0-25.4mm-Difference:±0.1mm-Material: ABS plastic-Net product amount: about 40g-Product accuracy: 0.01mmFeatures:-Large LCD display, clear to read the data.-A nice guide to indicate when to change tyre.-Zero setting at any position. -mm / Inch system interchange.-Manual power on / off, digital automatic display.-There is scale on the stretch pole.-Suitable for tread depth, brake shoe and pad wear.Instructions for use:Step 1: Press the power button to turn on the machine and check whether the display is normal.Step 2: