Mantua Heavy-Duty Insta-Lock Universal Adjustable Bed Frame - Black Steel Bed Base Adjusts for Twin, Full, Queen, or King Size Mattress COMPLETELY CUSTOMIZABLE: Mantuas universal bed frame adjusts from 38 to 76 inches, making it perfect for any size mattress. STURDY CONSTRUCTION: Made from recycled railroad steel, our adjustable bed frame includes a center rail for extra stability. INNOVATIVE LOCKING DESIGN: The Insta-Lock design gives your box spring a secure and stable fit while making it easy to adjust. EASY TO MOVE: The bed frame set includes four wheels so your bed can be easily moved for cleaning or to rearrange the room. NO TOOLS REQUIRED: Since no tools are needed to assemble the bed frame, installation is quick and easy. Can be adjusted to fit any size bed, so product width is adjustable from 38-76 inches