1. Designed for internal and external diameter, depth and step measuring. 2. Come with a plastic protection case to restore it. 3. Clear and large LCD screen display a clear and easy-to-read measuring result for you, with an easy-to-switch button between Inch and mm. 4. Extra accurate: 0 - 4 inch / 0 - 100mm; Resolution: 0.01 inch / 0.1mm; Accuracy: +/- 0.2mm/0.01 inch. Test and calibrated to reach extreme accuracy in manufacture.
