Review on Drywall Anchors for Concrete Walls - Reliable Hanging Fastener by Mike Wallace

Before that I used other screws of this type but not from this brand. The first worrying factor was that the clips that attach the anchor to the inner wall (rather than the metal lever) came loose and lay loose in the box. Save a few and install them. A total of six were installed. After tightening the bolt (or trying to tighten it) two latches broke off and one was unscrewed from the inside (remember those loose clamps?). I had to remove the entire piece I was installing and remove the three broken switches. Use another way to replace them. I threw the rest of the switches in the trash.