The frame of the glass by-fold door is aluminum so magnets will not work on it. There is two small holes in the casing that looks like something used to be there. I suppose I could use the tension rods or just a piece of wood, but someone who has that kind of door must have some way to keep it closed that the manufacturer installed. These doors are very common from what I have seen and I just can't imagine that there is not some latch that is supposed to be there that has fell off or something. But most thanks for those who have responded I appreciate it very much.