Well, it seems that the last owner of the heads must of started to remove them to convert them to screw in studs like I used to do all the time. Then he realized that they were not available any more and just left them half installed.
Title: Well, it seems that the last owner of the heads must of started to remove them to convert them to screw in studs like I used to do all the time. Then he realized that they were not available any more and just left them half installed.
