Threaded Plug Gauge Assembly, Dimension Type Metric, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 000, Thread Class 6H, Thread Size M1.6 x 0.35, Thread Type Metric, Tolerance Class X, Gauge Finish Chrome Plated, Gauge Length - Go Member 6.40 mm, Gauge Length - No-Go Member 6.40 mm, Gauge Material Tool Steel, Handle Color Yellow, Handle Length 1 1/2 in, Hardness RC 70-72, Included Certification Certificate of Accuracy with NIST Traceability