For me it does not work to the point that I learn about other products. The two hooks are (presumably) intended to bear on the top of the frame at the back of about 1cm, thus if the doorway is not square and not exceeding of at least 1 cm from the wall ... we picked! But without it, the principle which I found very thought at first no longer inspires confidence at all once in my possession. That said this is my personal case and apparently it works well in others.