Accuracy (mm): 0.03MM Material: 40 steel ruler frame, threaded rod bearing steel Resolution (mm): 0.01mm Measuring range (mm): 0-25mm Universal: measure outer thickness, diameter and other external measurements Convenience: suitable for slots, narrow places Advanced design: the uniquely designed numbers are accurate and easy to read. High-quality measurement: no error, quick and easy adjustment, 0-25mm fast measurement, 0.01 division Additional accessories: comes with a plastic case and a calibration wrench for easy zeroing Good quality product Note: The data are all measured manually, please allow an error of 1 to 3cm, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.