Dial indicators have a lever-style or plunger-style travel and internal gears to amplify a displacement or change in value from a nominal zero point on a dial face. Digital indicators and inductive probes with displays are able to perform similar measurements in similar applications using linear encoders with a digital display. Dial indicators are commonly used for setup and calibration applications on the shop floor and when measuring and amplifying slight variations is essential. Indicator holders and bases and comparator and transfer stands provide a solid, stable, and reliable base. Indicator holders, most commonly sold with magnetic bases, provide solid, stable, adjustable, and reliable positioning of indicators on which inspection of small components and workpieces can be performed in a QA environment.