Threaded Plug Gauge Assembly Set, Dimension Type Metric, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 000, Thread Class 6G, Thread Size M2.5 x 0.45, Thread Type Metric, Tolerance Class X, Gauge Length – Go Member 9.50 mm, Gauge Length – No-Go Member 9.50 mm, Gauge Material Tool Steel, Handle Color Yellow, Handle Length 1 1/2 in, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability, Long Form Calibration Certificate No