GIANT Metric M64 64 mm by 1.5 mm tap GREAT COND HSS

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For sale is a metric M64 by 1.5 Tap. This means, I think, that it is 64 mm in diameter and the thread step is 1.5 millimeters. I could not find any evidence of any damage to this tap, all teeth look great. Possibly, it was never used.