Threaded Plug Gauge Assembly Set, Dimension Type Metric, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 2, Thread Class 6G, Thread Size M12 x 1.50, Thread Type Metric, Tolerance Class X, Gauge Length – Go Member 25.40 mm, Gauge Length – No-Go Member 25.40 mm, Gauge Material Tool Steel, Handle Color Yellow, Handle Length 3 in, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability, Long Form Calibration Certificate No