Fischer Nylon Aircrete Anchor 10mm GB10 (20 Pack)

With an Aircrete or Low Density Concrete structure which is apparently rare in the US, these anchors were the only thing I could find that would actually hold anything to the wall, and that they do. In case you don't know what Aircrete is, it's basically concrete structural blocks but instead of sand or stone as an aggregate, they use styrofoam beads. It's amazingly quiet, well insulated, and structurally amazing. What it's not good at is having anything mounted to the walls, like pictures or whatever you feel like you might want to attach, like a towel rod. These thread backwards from the screws you drive into them, and so they are the thing you need to really get anything to permanently stick, awesome, so I ordered 2 more boxes.