[Household Measuring Tools] This plastic carbon fiber digital caliper is ideal for woodworking, jewelry and DIY measurement. With its excellent material toughness and low hardness, it can effectively avoid scratching the measured object. [Measurement Accuracy] With a resolution of 0.01"/0.1mm and accuracy of ±0.2mm/0.01", it can be applied to almost all home use scenarios (for industrial-grade high-precision use scenarios, please purchase additional professional tools) [Main Function] 1.Measure inside and outside diameter, depth, and step with two sets of jaws ( upper and lower ) and a depth probe. 2.Quickly convert measurements between inches and millimeters. 3.Allows you to set zero at any point on the scale for more accurate measurements. [Energy Saving and Safety] Open automatically turn on, and automatically turn off after 5 minutes of use. The caliper measuring feet are made of insulating plastic and have higher safety than metal calipers when measuring charged objects. [After-sales Service] We are committed to providing customers with high-quality and practical tools. If you have any dissatisfaction with our products, please feel free to contact us, we provide return service within one year.