Starrett 656 Dial Indicators have a shockless, hardened steel gear train and jewel bearings. Features include a lug-on-center back and antimagnetic and special non-shock mechanisms.Balanced and tapered hands are easy to follow. This model features a 0.5" Measuring Range. If lift lever is desired, indicator must be ordered with case stem cap. 0.5mm Range, Dial Reading 0-10-0, 0.002mm Grad.