Double bed frame purchased to,replace slats which supported mattress on an IKEA bed.   As bed aged it seemed to "relax" and slats were always sliding off.   Once slats and their metal supporting rails were removed the Gabriele frame fit perfectly inside the wooden head/footboards and sides of the bed.   No more rolling over and having the mattress sag to the floor!  No assembly of the Gabriele metal frame required.  Comfortable mattress support.  A fast solution at a fraction of the price of a new bed.