This Review Title is These Did Not Work For Me and the content is: I bought a pair of them and used them on porcelain tile.  I followed the instructions and they fell off under their own weight. I then tried them with super glue to no avail.  I then tried them with epoxy and again they fell off.  I am trying one more time with two sided tape..There are other information for this review, one is This reviewer did purchase it and the other is 0 people think this review is helpful.