Pin Gauge Set ZZ Minus .011 in-.25 in 240 pcs. Material Steel Diameter Increment 0.001 in Diameter Range 0.0110 in to 0.2500 in Gauge Type No-Go (Minus) Overall Length 2 in Tolerance +/-0.00020 in Hardness RC 60-65 Included Certification Certificate of Accuracy Standards NIST Dimension Type Inch