It's a beautiful mirror, but it arrived with no installation instructions whatsoever.   There were metal circles in the corners which were quite flat, making it very challenging to mount on the wall.   The nails had to be placed in the wall in precisely the correct location and it was difficult to mount those metal circles on the nailheads.   We finally were able to do so, but it wasn't easy as the mirror is quite heavy.   We were surprised to find that each of the squares is an individual beveled glass, rather than one full plate glass sheet.   But the overall look of the mirror is great.