Mitutoyo 340-351-10 LCD Outside Micrometer, Interchangeable Anvils, Ratchet Stop, 0-6"/0-152.4mm Range, 0.00005"/0.001mm Graduation, +/-0.0002" Accuracy Bow-type micrometer for measurement of large outside dimensions Includes interchangeable anvils for a diversified range of measurement Digital, single-value readout LCD displays in inch and metric units for readability Ratchet-stop mechanism helps provide uniform pressure for precise, repeatable measurements Statistical Process Control (SPC) output transmits results to a computer or external device through an interface cable (sold separately)