mitutoyo dial vernier caliper 200mm x 0.01mm range 0 - 200mm graduation 0.01mm range/rev 1mm accuracy ±0.03mm new designed dial movement for ultra smooth sliding and high shock protection. titanium nitride (tin) coating is applied to the sliding surface to increase wear resistance(except for 0-300mm and 0-12" model). can measure od, id, depth, and steps. lock screw for dial bezel and for holding the slding jaw position . models available with carbide-tipped od and id jaws. supplied in fitted plastic case.