Google "Molly bolt" to see what you are dealing with. I have done all three in order of ease.
1) If they are recessed a little just patch over.
2) Drill the heads off with a drill slightly larger than the hole. and leave the rest in.
3) Put the screw in a few threads , then tap to straighten. Wiggle and pull it out.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
DIY Home Improvement Forum
A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself!