Inst-a-matic® Heavy Duty bed frame – “One size fits all” universal – twin/full/queen/California king/eastern king, center support – 7 legs with rug rollers and glides. An extra heavy-duty bed frame strong enough to support all bedding. Made of heavy duty high carbon, recycled railroad rails with a water-based, lead-free finish. Unique wedge lock leg design becomes even stronger with use. 2″ x 1 1/2″ side rails provide additional support. Permanently attached locking system. Solid rivet construction increases durability. Rounded corners provide safety and recessed legs offer additional toe room. Heavy-duty brackets. Easy to assemble, no tools required.