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 .400" Measuring Range. If lift lever is desired, indicator must be ordered with case stem cap. .400" Range, Dial Reading 0-20, .0001" Grad.