Wide World Maps & MORE! 24" Just Hang-It! Wall Hanging Rail Set

Is it possible to attach a cord or chain to the eyes and hang my poster that way? I don't want to put two holes in my wall.

Are these flat or curved? I'm looking for something to protect the edges of my poster instead of just going with just the poster tack/adhesive

Can this product be cut down eaily? I need a 13 inch rail set for a silk wall scroll.

Can I use this to hang a poster from a drop ceiling? Would I be able to hang 2 posters back to back for a dbl sided effect?