Click to expand Tap to zoom King Caster HB-FB Connecting Frame by Best Sleep Centre Save $-169.00 $169.00 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart This metal frame supports your queen size or king size mattress and boxspring and provides connectivity for a headboard and footboard. It comes with eight caster feet, two centre support rails, is 80" in length and uses nut & bolt assembly.