I received a pair of wall sconces for christmas and I don't know how to hang them. They are not electric, but they did not come with any hanging hardware and don't have any spots to put nails, hooks, or screws into. They are made of metal and are in a dual swirl shape (one swirl above the other), and I think I need to hang the middle part of the swirl on them. The part I am having trouble with is the type of hardware to use. If I use a nail they could just be pulled off of it, and if I use a hook it would show a lot. Is there something special for this type of thing?
Decided to post a picture: