This exceptional measuring tool is designed to deliver instantaneous and precise readings of inside, outside, step, and depth measurements, with an impressive accuracy of 0.01mm. With the simple press of a button, the mm/inch conversion switch automatically converts measurements to either inches or millimeters, allowing for seamless and effortless use. The adjustable thumbscrew provides optimal tension for smooth movement of the slide, and securely locks the jaws of the caliper in place. Additional features such as the zero calibration switch, automatic On/Off function, and easy-to-read LCD display, only add to the exceptional value of this durable stainless steel construction. Boasting a measurement range of 0-150mm with units available in MM or INCH, this digital ruler is powered by a reliable 1.5V LR44 battery. Experience the convenience and precision of this remarkable measuring tool today.