These bed risers give you storage space you never had before. These sturdy blocks instantly elevate your bed for up to 6 inches of additional under-bed storage space, perfect for those extra large storage bins. They are engineered to be incredibly strong, and can also be used to aid in the treatment of some medical conditions. These bed risers are perfect for any dorm room setting. Features: Instantly creates additional under bed storage Either head or-feet of bed can be raised for medical conditions Holds approximately 1200-pound Pyramid design keeps your bed steady For use with stationary or lock-wheel bed frames only.