High precision expert dial gauge for precision measuring work Water proof and dust proof dial face features O-ring and additional internal housing sealing Shock-proof mechanism prevents damage to the internal gears if the spindle is pushed abruptly Hardened SK quenched steel stem is specially fastened to eliminate failure Superior quality spindle rack, pinions and gear trains ensure longevity Easy read design incorporates white dial face with black graduations and pointer needle Knurled Bezel provides a firm and secure grip Meet or exceed applicable US federal specifications and conform to American Gauge Design #2 (AGD #2) Specifications Made in Japan