Description: Measurement range: 0 - 6''/ 0 - 150mm; Resolution: 0.01”/ 0.1mm; Accuracy: ±0.2mm/0.01”. Perfect and accurate caliper measuring tool for household/DIY measurement. Please choose stainless steel digital caliper for more accurate measuring. 4 Measuring Modes ： This digital caliper can be used to Measure inside and outside diameter, depth and step with two sets of jaws and a probe. Inch/mm Conversion： One button quick switch between two units: inch and millimeter, definitely save your time. Made of rugged plastic carbon fiber composites, durable and portable. Zero Setting Function： The smart design allows you to set zero with an easy touch of a button and start a new measurement at any point of the scale, ideal for differential measuring. Large LCD Screen & Auto Off： The large and easy-to-read LCD display helps you get precise results quickly and easily, auto shutdown for saving battery after 5 minutes if without operation. 4 Ways of Measurement -External Measuring: Measuring the outer diameter of objects with the long jaws. -Internal Measuring: Measuring the inner diameter of objects with the top jaws. -Depth Measuring: Measuring the depth of hard-to-reach small objects with the long probe. -Step Measuring: Measuring the height/length with its step design. Specification: Material: Carbon Fiber Composites Size: 9.4 x 3 x 0.6in Measuring Range: 0-6 inches/0-150mm Accuracy: ±0.2mm/0.01” Resolution: 0.01”/0.1mm Battery: 1.5V LR44 cell battery (not included) Package Includes: 2 x Digital Caliper