An adjustable holding assembly is provided to support a tubular member and includes a base assembly adapted to be mounted to a support surface. The base assembly includes a vertical shaft defining a vertical pivot axis, and a horizontal shaft rotatable about the vertical shaft and defining a horizontal pivot axis. A holder is adapted to receive the tubular member and is pivotally mounted to the base assembly so that the holder is simultaneously rotatable about the vertical pivot axis and the horizontal pivot axis. A single latching arrangement is carried by the horizontal shaft and is configured for selective engagement and disengagement with the base assembly to permit a one-handed adjustment of the holder simultaneously about the vertical pivot axis and the horizontal pivot axis or separately about either the vertical pivot axis or the horizontal pivot axis to multiple angular locked positions with respect to the base assembly.