Mitutoyo's popular Coolant Proof Micrometer w/SPC Output! Specifications Include... 17-18" / 431.8 - 457.2mm Measuring Range 0.0001" / 0.001mm Resolution Accuracy + .00035" Features Include... With a standard bar Supplied in fitted case Ratchet Stop SPC Output Functions Include... Origin Set Zero Set Auto Off Data Hold in/mm conversion