Ok, here's the problem. I have a coat rack that was installed poorly by the previous owner, who firstly installed it upside down and then secondly didn't use any drywall mounts. It came right out of the wall. I purchased some toggle bolts and some dry wall anchors only to discover what I believe is concrete behind the drywall (the back side of the wall is the elevator shaft).
Given that I cannot damage the concrete (it belongs to the condo's common property), and all of the drywall hangers I've seen are either too long or rely on the backside of the drywall being open, is there any way to mount the coat rack safely?
Any attachment should probably be able to take at least 50 lbs of weight, given I live in Canada and it will be holding up to five winter coats, mitts, hats, scarfs and it has a shelf above it where I occassionally put books and the like. Also the coat rack only has two holes for screws.