Only 1 out of 3 worked as expected. The teeth should bite into the drywall paper, but even that failed on one of my attempts. I stuck it into the drywall and tried to tighten it but it started twisting the entire anchor and ripping the drywall. I've had two failures this way, and if that's the case, all you can do is pull it out. You can't start over. Now all you have is a hole in the wall. The other one that failed I fully tightened, but as soon as I started backing out the screw it got stuck in the threads and started tearing the drywall paper. This left a coin-sized hole in my wall. The design does not lend itself to the flat drywall found in most homes. You want an anchor with more surface area to compensate for the fragility of the drywall around the hole you just drilled for the anchor.