Threaded Plug Gauge Assembly, Dimension Type Metric, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 2, Thread Class 6H, Thread Size M12 x 1.00, Thread Type Metric, Tolerance Class X, Gauge Finish Chrome Plated, Gauge Length – Go Member 19.00 mm, Gauge Length – No-Go Member 9.50 mm, Gauge Material Tool Steel, Handle Color Yellow, Handle Length 3 in, Hardness RC 70-72, Included Certification Certificate of Accuracy with NIST Traceability