This 2-axes swivel is used for mic assemblies (Stereo Bar, A-RAY, etc.), which are suspended from a boom such as the Jumbo Series.
It ensures that the mic assembly always levels out horizontally independent of the angle the boom is set at.
When the boom is vertical the “MikeLink” prevents the microphone assembly from contacting the boom and thus making noise.
It also allows the microphone position to be set up at ground level and then be swung up into position.