The Starrett 81-281J-8 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. 81-281J with 8mm Stem, 0.01mm Grad.