MITUTOYO Vernier Caliper 531-129 Vernier calipers are measuring instruments that are primarily used to measure linear dimensions. The diameter of circular objects can be measured with these calipers. Can measure outside and inside dimensions, depth, and steps. The slider moves only when the spring-loaded thumb clamp is depressed. Mitutoyo dual-scale, high accuracy/resolution vernier caliper equipped with a thumb clamp and standard outside and inside jaws. Hardened stainless steel construction with easy-to-read, satin-chromed scales. The Part Number is 531-129 MITUTOYO Vernier Caliper Features Vernier calipers have a fixed jaw paired with a sliding jaw that moves along a graduated scale to take inside and outside measurements. The jaws are used to contact the opposite sides of an object, workpiece, or feature. Operators read the main and vernier scales and add the values together to determine the reading. Hardened stainless steel construction 4 way measurement OD ID depth step The small vernier face angle (14°) provides easy reading Lock screw for holding the sliding jaw position Range / 0 inch to 8 inch; 0 mm to 203.2 mm Graduations / 0 inch/0 mm (Lower Scale); 6 inch/200 mm (Upper Scale) Accuracy / +/-0.03 mm Caliper Material / Stainless Steel Dimension Type / Inch/Metric Graduations - Lower Scale / 0 inch/0 mm Graduations - Upper Scale / 0.001 inch Jaw Actuation Type / Thumb Clamp Jaw Depth / 1-31/32 inch Maximum Measurement - Decimal Inch / 8 inch Maximum Measurement - Fractional Inch / 8 inch Maximum Measurement - mm200 mm Measurements / 4-Way Measures Depth / Yes Measures Inside Dimension / Yes Measures Outside Dimension / Yes Measures Step / Yes Minimum Measurement - Decimal Inch / 0 inch Minimum Measurement - Fractional Inch / 0 inch Minimum Measurement - mm / 0 mm Operation Type / Mechanical Case Included / Yes Case Type / Vinyl Holster with Fitted Carton Finish / Satin Chrome Jaw Shape / Standard Jaw