The body of the thickness gauge is made from high quality engineering plastics, lightweight and durable It is designed with a large digital LCD display for convenient data reading Support reset function at any position, metric and imperial system switch, manual power on/off and auto power off Suitable for measuring situations requiring special insulation and protection magnetic or anti-scratch Can be used to measure the thickness of paper, PU leather, sheet metal, jewelry, battery, magnetic materials, etc. Features: This thickness gauge has a large digital LCD display for convenient data reading. The main body is made from high quality, lightweight and durable engineering plastics. It is similar in shape to micrometer, and the function is also similar to micrometer, mainly used to measure outer diameter of tube or rod and measuring thickness. Instruction: 1. Press the on/off button to turn on. 2. Check if it shows 0.00, if not, reset it by erasing on the ZERO button. 3. Press down on the pressing bulge and place the coin inside then release the bulge. Read the measurement result and measure a few more times then calculate the average of the results to get a more accurate one. Features: Measurement range: 0-12.7 mm / 0.5 inch Resolution: 0.01 mm, 0.0005 inch Accuracy: 0.1mm, 0.005inch Operating Temperature: 0~40 Storage temperature: -20~70 Relative humidity: 80% Power: LR44 button battery Size: 106 x 38 x 22 mm Blue color Package: 1 x Feeler gauge