Abstract: A uniplanar bone anchor including a housing and a bone screw is provided. The lower region of the housing defines mating elements that mate with engaging elements on the bone screw to limit movement of the housing relative to the bone screw to a single plane.

Abstract: A pivoting frame for carrying sheet material, which frame is mounted in a pick-up truck bed at one side of the bed and is adjustable for receiving various types of sheet material such as sheetrock, plywood and the like. The frame is mounted to the pick-up truck bed side and floor and is designed to pivot into a first loading and unloading configuration outwardly of the pick-up truck bed at a selected access angle and inwardly of the pick-up truck bed for transportation purposes. In a preferred embodiment the pivoting arm elements of the frame are adjustable along with the frame mount, to facilitate mounting the pivoting frame in pick-up truck beds of various design.