Tera Tools Digital Caliper 8"/200mm Stainless Steel with Large LCD Screen and Inch and Metric Conversion Silver Easy to operate, one button to switch between inches to mm Hardened stainless steel shaft with depth-measurement probe, precision ground jaws Machine-grooved thumb-roll mechanism and position lock for sure adjustment Range:0-200mm/0-8"; Resolution: 0.01mm/0.0005"; Accuracy: 0.02mm/0.001"