Adjustable Bed Frame for Headboards and Footboards: * All-steel bed frame support system provides excellent support for your back, legs and spine * Adjustable bed frame comes with versatile brackets for bolt-on headboards and footboards * No-tools design and key-slot cross arms for quick and easy, accurate assembly * Twin and Full sizes have four legs with adjustable steel stem glides * Queen and King bed frames have six legs with adjustable steel stem glides * Center bar offers extra support on Queen and King bed frames * Frame should only be used with a headboard and footboard