The Starrett 81-281J 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. 2.5mm Range, Dial Reading 0-100, 0.01mm Grad.