Abstract: An adjustable cable draw mechanism including a pair of interlocking elongated channel members slidable relative to each other so as to vary their combined length, a plurality of rollers mounted in end-to-end relationship and lengthwise on each of the channel members, hooks on the outer ends of the channel members for mounting the channel members in underslung relationship to the sides of a cable tray, and adjustable mountings for the hooks to both vary their height and their position on the channel members.