When working with such sensitive measuring instrument like micrometer, it is necessary to hold it with two hands — and what to hold on to what is measured! A kind of third hand may be that the bracket on the stand that allows you to quickly secure the MIC, freeing your other hand for holding the measured part.
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The old "stuck" or rusty screws and hard screws unscrewed in the usual screwdriver. But enough to drill in the handle hole and insert the metal shaft so the knob will be able to remove...
