Abstract: The present invention relates to a universal adjustable mount for use as a work support device which comprises a base, a split housing rotatably mounted to the base, a post, and a split bushing for releasably receiving the post and for selectively gripping the post. The bushing is mounted within the housing for turning movement about an axis, and the housing, the bushing and the post are selectively arrestable and subsequently releasable upon actuation of a single clamp device. The interior of the housing is formed so as to maintain the bushing in its arrested orientation relative thereto. The device further includes a leaf spring mounted between the bushing and the housing which is operable to snug the bushing against the housing during actuation of the clamping means to the locked position.