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The internal caliper is used to measure the deep hole, diameter, taper and annular groove of the workpiece, etc.Simple and practical jewelry making tools Composed of two straight calipers connected to a shear caliper.Small and portable, beautiful and practical It has a ruler table with a circular scale and three indicator needles.Exquisite workmanship, clear scales, easy reading The measured size can be reduced to the core and then enlarged through the internal caliper, and the pointer can indicate the measured value Measuring size scale tools for jewelry with 0-10mm measuring range
