There are invisible Hanger, said the unique protruding design, so that the box does not need to dig.
You just put the coupon fixed on the box, and then made a hole in the wall, plug the expansion tube or cork, screw on the screw, (the screw to expose the space, do not top to the end) and then the box on the mirror align the screws on the alignment.
Can also be hung on the wall, the box screwed on the screw, do not screw in the end, leaving a little space, just hung up.