Mitutoyo 293-183-30 QuantuMike Coolant Proof Micrometer has a measuring range of 3-4/75-100mm" and Inch/Metric conversion with SPC data output. This series provides faster measurement with 2mm per rev. instead of the standard 0.5. Features a patented ratchet thimble mechanism to help ensure repeatability, a function lock to help prevent error and IP65 level of protection. Also includes carbide tipped measuring faces, an LCD screen, origin-set, Zero/ABS, automatic power On/Off and is supplied in a fitted, plastic case.