digital micrometer 125 150mm tolerancy 0 001 mitutoyo shorts (3) New AA Batteries included. The item Mitutoyo 164-135 Digital Micrometer Head 0-2''. Units of Measurement Inches or Millimeters. Travel Range 0-50 mm (0-2 in). Travel Range 0-50 mm (0-2 in). The Mitutoyo 164-135 Digital Readout Micrometer Head features a digital display, a 0-50 mm (0-2 in) travel range, a resolution of 0.001 mm (0.0001 in) and can measure in inches or millimeters.