Threaded Plug Gauge Assembly Set, Dimension Type Inch, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 5, Thread Class 2A, Thread Size 1-1/2 In.-6, Thread Type UNC, Tolerance Class X, Gauge Length – Go Member 2 3/8 in, Gauge Length – No-Go Member 1 5/8 in, Gauge Material Tool Steel, Handle Color Blue, Handle Length 4 in, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability, Long Form Calibration Certificate No