MARATHON CO030200 Standard Digital Caliper 8in/200mm Caliper Range: 0 to 8 inches / 0 to 200 mm. Instant inch/millimeter conversion. Switch between metric and imperial measurements with great ease. Absolute, floating zero, and relative measurements -(you can zero out at any point) Caliper has External, internal, step and depth measurements Caliper comes with carrying case and extra battery