Pin Gauge Set Material Steel Diameter Increment 0.001 in Diameter Range 0.9170 in to 1.0000 in Gauge Type No-Go (Minus) Number of Gauges 84 Overall Length 2 in Tolerance +/-0.00020 in Tolerance Class ZZ Hardness RC 60/65 Included Certification Certificate of Accuracy Long Form Calibration Certificate Yes Standards ISO 17025 NIST Dimension Type Inch