Framatic Fineline 7 x 7 Black ultra-thin metal picture frames are easy to load and hang. They load from the edge, like a professional-grade metal frame. The 4th side pulls off after releasing two built-in latches. Then you slide the glass and backing materials out and put in your artwork. Simple! It comes with printed instructions to help you do this if it is not easy to figure out. Also has snap-in sawtooth picture hangers to allow for quick hanging on a nail or screw. Framatic is one of the few ready-made picture frame lines that has all kinds of unusual sizes, like square frames such as this.