Features: Range: 12-18" Accuracy: 0.00015" Available in inch and inch/metric models Ratchet mechanism provides an audible click to ensure measurement is being performed at a constant pre-set force Functions include Origin Set, Zero/ABS, Hold, Function Lock, Data Output, and inch/mm conversion (on inch/metric models only) Alarm: Low Voltage, Counting Value Composition Error Zero-setting standards bar for each range is included Scale is laser etched on thimble for quick and easy reading Carbide facing on the spindle resists wear to keep surfaces flatter with longer accuracy Speeder is always available for quick rotation of the spindle Supplied in a fitted wooden case The Mitutoyo 12-18" .001 Graduation Micrometer features a ratchet stop function and interchangeable anvils for measuring a wide range of workpiece sizes and material types with precision. Available in inch measurements. The Mitutoyo ratchet stop outside micrometer is ideal for measuring metal and non-metal workpieces by controlling the amount of force applied by the spindle. A ratchet-stop mechanism provides uniform pressure on a workpiece for precise, repeatable measurements. Interchangeable anvils allow for measuring a wide range of workpiece sizes.