The Starrett 81-261J Dial Indicator has a shockless, hardened steel gear train and jewel bearings. This model features a rugged and simple unit construction with a "universally fitting" design. If lift lever is desired, indicator must be ordered with case stem cap. Antimagnetic and special non-shock mechanisms are options available for all models. 0.5mm Range, Dial Reading 0-20, 0.002mm Grad.