This digital micrometer screw gauge features a 6-digit display that instantly converts between English and metric measurements. The metric scale measures up to 25mm with 0.001mm/0.0025mm accuracy, and the English scale measures up to 1 inch with 0.00005 inch readout. Supplied in a case with wrench and instruction manual. Suitable for precision measurement of small dimensions in physics laboratories, machine shops, and quality control applications.