SPI Electronic Inside Micrometer Features Include... 3" - 4" / 75 - 100mm Measuring Range 0.00005" / 0.001mm Resolution 0.00032" Accuracy Carbide measuring faces Painted frame with heat shield Inc. / Abs. / Inch / Metric measuring Ratchet thimble Spindle lock Includes Certificate of Calibration Furnished in fitted case.
