For over 60 years, Mantua’s Insta-Lock bed frame series has provided unmatched security and stability for box springs and mattresses. The design of the I-411PR is simple to adjust and provides the box spring with a secure and stable fit. Because no tools are needed for assembly, setup is quick and easy. Adjusts to fit Twin, Full, or Queen beds. For additional support, use an XR-5 cross support. Includes four legs with rollers so the bed can be moved to clean or rearrange the room.