I have had a hard time finding a metric thread gage, and was pleased to find this one. It is just what it claims to be. I'm not sure how durable it will be, being plastic, but it has worked perfectly so far. When you need to identify size and pitch of a metric bolt, this is essential. I do wish someone made a metal one, like they do for SAE bolts, but since that's not available, this is the next best thing.
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