Precision digital caliper measuring tool has a measurement range of 0 - 6/ 0 - 150 mm; accuracy to 0.001/0.02mm and resolution to 0.0005/0.01mm. Perfect and accurate caliper measuring tool for household or DIY measurement. Please choose stainless steel caliper measuring tool for more accurate measuring. 3 Units Conversion You can switch 3 different readings with the micrometer caliper: inch, mm and fraction based on your habits with the push of a button. Press the on/off button, slide the digital dial caliper to anywhere, then you can read the values on the display. And you can reset it to zero by zero button. Rest Assured Quality The body of the dial caliper measuring tool is constructed using finely polished stainless steel with a knurled thumb roller and locking screw that ensures smooth sliding and accurate positioning when taking measurements. 4 Measuring Ways vernier caliper comes with two sets of jaws and a probe, which are easy to measure depth, step, external and internal diameter, making all your objects measurable. 3 batteries are provided: one installed and other two as spare batteries Wide Application Auto OffThe 6 inch metric measuring tools is always used by professionals and hobbyists alike, by jewelers, hobbyists, woodworkers, DIY. Auto shutdown for saving battery after within 6 minutes if without operation