Nope, those are plastic sleeves, and they go right into the bottom part of the D-Ring.Are those white things self-adhesive foam? Or what?
I thought at first they might be designed to protect the wall once the D-rings are screwed onto the frame - but the ring and wire would stand proud of the screwy-inny part.
No, They slide into the d ringSo, if I am attaching D-rings to a wooden frame, I put down this piece of plastic and then screw the D-on top of that? How does that possibly make a stronger connection? It ends up with the utilization of slightly less thread on the screw. And when the plastic breaks down in a couple of years, and shatters into pieces, then the D-ring will be loose?
What am I missing here?