Measuring range: 12"/300mm. Accuracy: ± 0.0015"/0.04mm. Inch/Metric/Fraction reading: 0.0005"/0.01mm/1/128". Heavy duty frame for extra rigidity and wear. Direct inch/metric/fraction conversion. Floating zero. Super large, easy to read 14 x 52mm display. 4-way measuring. Combined thumbrest and thumbroll for fine adjustment.