Pin Gauge Set,ZZ,Plus,.0115 in-.0605 in 50 pcs., Material Steel, Diameter Increment 0.001 in, Diameter Range 0.0115 in to 0.0605 in, Gauge Type Go (Plus), Overall Length 2 in, Tolerance +/-0.00020 in, Hardness RC 60-65, Included Certification Certificate of Accuracy, Standards NIST, Dimension Type Inch