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 caliper with digital display uses alloy jaws with chrome surface, which are strong and wear-resistant and not easy to be damaged. METRIC & ENGLISH UNITS 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 fracture function). LOCKING SCREW This digital display has a locking screw in the gauge that locks clockwise at the current position and releases counterclockwise to unlock. Wide Application This internal gauge with digital display is very widely used and is mainly used to measure the inner diameter of all kinds of machining. Specification: Item Type:Digital Internal Caliper Battery: CR2032 3V button cell x 1 (battery not included). Specification: approx. 12.7-216mm/0.5-8.5inch Reading value: approx. 0.1 mm / 0.005 inches. Accuracy error: approx. 0.2 mm / 0.01 inches. Clear reading, small and exquisite, convenient to use ROLLE:Widely used in various ways of machining inner diameter measurements. Package list: 1 x digital internal calliper Package List 1 x Digital Inside Caliper