When the contractor opened the box, two of the hanging clamps  were not attached to the mirror.  This mirror must have been a returned item for the two clamps were held on with cheap tape. I had to pay contractor to use construction glue and screws to hold clams and wait for it to dry. Since the mirror was hung above eye level the screws in outer frame are not noticeable.  If I did not have the contractor there for doing other work, I would have sent the mirror back.