The Mitutoyo 505-750 Dial Caliper has a measuring range of 0 to 12" with .001" graduations, an accuracy of .002" and .2" range per revolution. Carbide-tipped jaws for OD measurement. This NEW model features improved finish on sliding surfaces for longevity and easier-to-read font. High shock protection. Equipped with a lock screw for dial bezel and holding the sliding jaw position.