The cheap, bright orange plastic anchors arrived with the panels. Not only did they seem like they might break if I screwed them into the foam, but you could see the orange from the anchors from the doorway into my studio. Not a nice tough when installing such professional looking panels. I called FrontEndAudio and Alan had them switched out for the heavy duty metal ones. Much better and they arrived within two days. I would give the plastic ones only one star, but the metal ones get a five.