SPI Hole Mike 2-Point Internal Micrometer Specifications Include... 0.160" - 0.200" Measuring Range 0.0001" Readings 0.78" Measuring Depth Setting Ring Includes Certificate of Calibration Features include... Self aligning and self centering Carbide measuring anvils Feelers taper toward the back for positive reading of the front edge Ratchet stop provides uniform measuring pressure Includes case