I needed to hang some curtain panels and couldn't find studs in the wall where I needed them, so I looked for anchor options. I saw their ads online and decided to give it a try. As long as they work well. I had to use 4 of these in my application. 3 out of 4 fit perfectly and work perfectly. The fourth created a large hole as I inserted the screw - the entire wall claw began to rotate with the screw, drilling a large hole in the drywall (the diameter of the wall bracket itself, about the size of a coin). Luckily the hole was big enough that I could see the edge of the next shelf, so I could screw it straight into the shelf without the fourth wall claw. I think part of the problem was my drywall - it looks like plaster in places, and the 4th wall claw doesn't hold up like the other 3. Overall, I like how easy it is to use the wall claw plus the curtain rod . still holding on. Thumbs up!