Mattresses and Accessories - Drive, Home Bed Style Adjustable Length Bed Rails, 1 Pair : These highly accommodating home bed style adjustable length bed rails by Drive Medical with fit any home bed. Easy-to-install (and remove) crossbars adjust between 36" and 72" and come complete with extensions that will even accommodate a king-sized bed. The rail length adjust to 37", 43" or 57" in length without tools. Both upward and downward adjustments are simplified by a spring-loaded release. The 1" steel construction with brown vein finish is durable and strong yet attractive.