An apparatus for carrying a workpiece adjacent an exterior surface of a vehicle, provides a stationary resting surface mounted on an exterior surface of the vehicle and one or more movable clamping bars positioned adjacent to the resting surface. A driving screw moves the clamping bar in a scissors type motion, alternately toward the resting surface, so as to clamp the workpiece, and away from the resting surface so as to release the workpiece, whereby the workpiece may be safely transported by the vehicle. The apparatus may be mounted onto a panel truck, normally adjacent to one or both side panels, or may be mounted on the sides of a pick-up type truck.