Adjustable bed frame: designed for your box spring and mattress set, this adjustable bed frame expands to suit your needs, conveniently adapting to fit standard twin, full or queen size. Sturdy support: constructed with heavy-duty steel that provides secure support, with a center leg and cross rail for additional stability, and recessed outer legs to reduce accidental bumps. Low bed frame: our bed base includes built-in headboard brackets, and has about 5” clearance beneath the frame, giving you room for underbed storage. Dimensions: 39” x 75” - 54” x 75” - 60” x 80” Easy assembly: effortless setup in just a few minutes, with all hardware and instructions included. Adjusting the frame to another size is quick and easy with our interlock system.