Description:Made of strong Plastic carbon fiber composites, lightweight and durable.Easy to operate, two way measurement, one button to switch between inches to mmAn ideal tool for a broad range of industrial and automotive applications.Measures inside & outside height dimensions, with a large LCD display, easy to take readingsMinimum scale to read is 0.1mm / 0.01 inch. requires one LR44 battery was included.Product Feature: Electronic Digital Caliper Made of hardened stainless steel Internal, external and height dimensions can be easily and accurately measured Linear capacitive measuring system Zero setting in any position With a small locking thumb screw which locks the jaws in place Base measuring function: Inside, outside, depth and step measuring With easy to read large LCD display An ideal tool for a broad range of industrial and automotive applications Product Specification: Measuring range: 0-150 Resolution: 0.01mmRepeatability: 0.01mmAccuracy: +/- 0.02 mm. (100 mm), +/-0.03 mm. (100 - 150 mm) Maximum measurement speed: 1m/s or 1.5m/s Working temperature:0 -40C