The Starrett 657T Flex-O-Post Indicator Holder with Magnetic Base. For use with all Starrett Test, Back-Plunger, AGD, Dial and Miniature-Dial Indicators. Also accommodates similar indicators of other manufacturers. Flexible post can be adjusted to any position and locked by turning a lever.
Useful in awkward places that are hard to reach with conventional holding devices. The post has a vertical reach of approximately 15" (380mm) and a horizontal reach of approximately 10" (250mm).