Threaded Plug Gauge Assembly, Dimension Type Inch, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 0, Thread Class 2B, Thread Size #12-24, Thread Type UNC, Tolerance Class X, Gauge Finish Chrome Plated, Gauge Length – Go Member 13/32 in, Gauge Length – No-Go Member 9/32 in, Gauge Material Tool Steel, Handle Color Blue, Handle Length 2 in, Hardness RC 70-72, Included Certification Certificate of Accuracy with NIST Traceability