I ordered these earrings because it showed on the description that they had screw backs.  I lose too many backs to my studs so I thought this would be great.  First ones I received did not have the screw backs so I called and returned them and they sent me another pair.  They did not have the screw backs either.  The description plainly says they are screw back earrings and even shows a sample of the way the screw backs work.  Anyway, didn't want to have to mess with this again so kept the earrings.