Black Oxide-Coated Pin Gauge Library, Material Tool Steel, Finish Black Oxide, Diameter Increment 0.001 in, Diameter Range 0.0610 in to 0.7500 in, Gauge Type Go (Plus), Number of Gauges 690, Overall Length 2 in, Surface Finish Uncoated, Tolerance 0.0002 in, Tolerance Class ZZ, Hardness RC 60/65, Included Certification Certificate of Accuracy, Long Form Calibration Certificate No, Number of Drawers 4, Standards ISO 17025:2005, Dimension Type Inch