For over 60 years, Mantua’s Insta-Lock bed frame series has provided unmatched security and stability for box springs and mattresses. The Insta-Lock design provides the box spring with a secure and stable fit. Because no tools are needed for assembly, setup is quick and easy. Made to fit Queen size beds and includes a center cross rail and five legs with glides to protect the floor and prevent the bed from moving. This frame can also be used as a Full when placing the center rail diagonally.