Extra mattress rail stopper a combination of mattress sliding stopper and headboard. It prevents the mattress from sliding off and creates extra storage space for your nightstand. material our mattress frames are made of thick material, not easy to deform and rust. Suitable for any mattress. Avoid unnecessary trouble add a metal plate to lock the bed frame while protecting your bed frame from scratches. Universal design the mattress mounting bar is adjustable in both width and height. You can adjust it to your suitable height for most bed frames. Use scenarios In a small bedroom or studio where space is tight, use the rail stopper to prevent mattress movement and gain extra storage area near the nightstand. In dorm rooms or rental apartments with varied bed sizes, the adjustable width and height accommodate most bed frames for a secure fit. When rearranging or moving furniture, use the movable metal plate to lock the bed frame temporarily and protect surfaces from scratches during setup.