The silver locking nut on the black adjuster bar can get tight or stuck for several reasons including incorrect UN-installation of the dance pole or environmental factors such as humidity which cause metals to naturally tighten and contract as temperatures change over time.

If the pole is NOT currently installed as shown in the photo to the left and the locking nut is stuck, you can simply unscrew the black adjuster bar out of Main pole A, spray the locking nut threads with WD-40 and then loosen the locking nut - it should unscrew a lot easier and loosen once sprayed.

If the pole IS currently installed and the locking nut is stuck, please go to this article for help: