For over 60 years, Mantua’s Insta-Lock bed frame series has provided unmatched security and stability for box springs and mattresses. The deluxe I-PK470 provides the box spring with heavy-duty support. Because no tools are needed for assembly, setup is quick and easy. Adjusts to fit Queen and King size beds. Includes a center rail and six legs with glides. Four legs include rug rollers for mobility. The center legs use glides for increased stability.