Features Large LCD Display: This digital internal caliper uses a large LCD display to display the value, which is quick and clear to read. Alloy Jaw: This internal digital display caliper uses alloy jaws with chrome surface, which are strong and wear-resistant and not easy to be damaged. Metric and English unit conversion: This digital display has a unit conversion button on the internal map display, and the short button can be used for metric and English conversions (F for fraction function). Locking Screw: This digital display has a locking screw in the meter that clockwise locks in the current position and is loosened counterclockwise to unlock. Wide Application: This digital display internal gauge is very widely used and is mainly used to measure the internal diameter of all kinds of machining. Specification: Item Type: Digital Internal Vernier Caliper Battery: CR2032 3V button cell x 1 (battery not included) Specification: Approx. 12.7-216mm/0.5-8.5in Reading Value: Approx. 0.1 mm/0.005 inch Accuracy Error: Approx. 0.2mm/0.01in Clear reading, small and exquisite, convenient to use Role: Widely used in various types of inner diameter measurement processing. Package list: 1x Digital internal caliper Package List 1 x Digital Inside Caliper