Could not get these to work for the life of me. Cleaned and prepped the wall, stuck them on there, pressed fully for a while and then let them sit for a day before adding weight. The darn things didn't even last an hour trying to hold up a normal, light-weight broom. They look nicer than some of the other crummy options out there, hence my own purchase, but I learned my lesson the hard way and emphatically recommend that you look for something else, these don't work and now I just have a bunch of wasted plastic. =(
No luck with these, full waste of $$$