The positive locking ring holds the exact selection of the vernier very well. But the 0-10 marks on this vernier are simply drawn. After using it three times, the drawn numbers are already erased. The coarse adjustment dial is much easier to read than the buttons, which have readings engraved on the stem. There was a thin crack on the key head next to the shank. Normally it wouldn't be noticeable, except that there were grinding marks on the head, so I took an X-ray.
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