With the Mitutoyo 103-180 outside micrometer, you carry out highly dependable external measurements across a 3 to 4 inch range. The integrated ratchet stop applies uniform pressure for precise, repeatable readings every time. Thanks to the clear 0.001" graduations and a handy spindle lock, you verify outer diameters and material thicknesses quickly without reading errors. Wear-resistant carbide-tipped measuring faces on the spindle and anvil maintain optimal flatness during demanding workshop quality checks. Supplied with a 3" setting standard and a fitted storage case, this tool gives you complete confidence in imperial inspection tasks.