Performs easy and accurate measurement of narrow or recessed areas, plus inside and outside diameters that dial indicators cannot access No-clutch structure for automatic reversal of measuring direction One-piece bezel and crystal design with O-ring provides resistance to water and dust Glare-free flat crystal face has a scratch-resistant coating High sensitivity and quick response because of jeweled bearings Standard carbide contact point provided Indicator Style Dial Test Indicator Range per Revolution 0.030″ Total Range .030 Features Dial Color White Graduation 0.0005″ Dial Reading ‎0-15-0 Model No ‎513-412-10E