Magnetic Base

Starrett 657AA, Magnetic Base Indicator Holder – Complete Set.
For use with all Starrett Test, Back-Plunger, AGD, Dial and Miniature-Dial Indicators. Accommodates similar indicators of other manufacturers. Includes magnetic base with all attachments: upright base post, two snugs, rod, and indicator attachment. Push-button on/off switch for one-handed operation. Grips horizontally, vertically, and upside down for versatility. Upright base post has overall length of 7-7/16 Inch length, with an adjustable 6 Inch long rod.