For comparative measurements of a part's tolerance against a reference measurement, these Starrett indicators have a balanced dial with positive values on one side and negative values on the other side.

These indicators come with a calibration certificate traceable to NIST that states they’ve passed a test for accuracy.

Take direct and comparative measurements with the same indicator. The combination dial has both a continuous scale numbered clockwise around the face and a balanced scale with positive values on one side of the zero and negative values on the other side.

Position the arm by adjusting joints at the top, middle, and bottom. The magnetic base provides a solid mount on metal surfaces.

Sets include attachments for indicator mounting.

Mount these indicators to a lathe tool post or a height gauge with the included attachment, also known as a universal shank.

A slim design lets you measure in tight spots.