Mantua’s 756-QK bed rails can be used to replace a Queen or King bed frame without brackets in order to attach a hook-on headboard and footboard. Fits most standard Queen or King sizes. Both the headboard and footboard must be used. Our rails are constructed from sturdy steel to provide lasting durability and support. Comes with a double center rail and two adjustable glides to add maximum support. For unique bedding problems, Mattress Mart has the solution.