The Mitutoyo 406-251-30 Non-Rotating Spindle Micrometer provides steady positioning during measurement for better accuracy and repeatability. The Mitutoyo Digimatic digital micrometer with a non-rotating spindle reduces torsion on softer parts being measured and prevents workpiece deformation and wear. A ratchet-stop mechanism provides uniform pressure on a workpiece for precise, repeatable measurements. Measurements are displayed on a coolant-proof, easy-to-read LCD readout.