I purchased this frame from a gentleman in Georgia back in the late 70s. He had a booth at a quilt show and I ordered this frame with two sets of rails, twin & king. The frame has only two rails when set up and is flat and not adjustable. It is light as a feather and very easy to move around. I do not remember the maker's name but I remember that I paid $100 for it and that was a lot of money at the time. A testament to his workmanship is the fact that it is still in perfect condition in 2010.