A stainless-steel digital caliper measuring 0-6 in / 0-150 mm with a large 6-digit LCD readout, inch/mm unit switching, a zero-reset button, and a slide lock screw to hold a reading in place. Rated accuracy around +/-0.001 in (0.03 mm) with 0.0005 in (0.01 mm) resolution, and it runs on a single 1.5V LR44 cell with auto shut-off. This NIST-certified version includes a traceable calibration certificate with full data and uncertainties, and typically ships with a hard case and screwdriver.