Isn't Mandrel the singer?  Barbara?

Ok, so "hollow wall anchor" is the concept then.  One drills a hole in the wall and taps it in.  Then a screw in screwed in which spreads the 'wings' of the anchor behind the sheetrock.

Two "shanks" connected at the end.  With a spreader screw in the center.  Slide it inside and then screw the screw in which widens the shanks.  Unscrew to reverse the shanks to a width where they can be removed.

Something along those lines.  Threaded spread.  The ACME threaded spread shank.