Black Oxide-Coated Pin Gauge Library Material Tool Steel Finish Black Oxide Diameter Increment 0.001 in Diameter Range 0.0110 in to 1.000 in Gauge Type Go (Plus) Number of Gauges 990 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 7 Standards ISO 17025 2005 Dimension Type Inch