I like using the super steel hangers from Larson/Juhl on frames with very narrow backs. They have holes in the back of each for two normal screws or two very small screws and a tab stamped out and angled up to tie your wire to. Recently a medium sized picture with glass that had only been framed a month or so fell off our gallery wall because the wire broke. I looked at it, and the wire had actually been cut through by the somewhat sharp edge of the hanger. We use vinyl coated wire, so this surprised me. I'm concerned with customers work I've used them on. I try to avoid them now, but have occasionally needed to on heavier frames that can use the added strength of the second screw, so I wrap the part the wire is tied around with heavy cloth tape to give it extra cushioning. I was just looking at the packaging they come in and it says "do not double loop". I don't see how a single loop would prevent this problem, I always use a framers knot to tie the wire. Has any one else had this problem?