On Jul 16, 5:39*pm, "ARWadsworth"
wrote:
Two adustable lugs on back boxes have long
gone and so have single eyelet sockets.

You can find them with MK Grid frame on a conventional backbox.
A grid frame has an adjustable lug which depending on orientation may
combine with the conventional box adjustable lug to result in two
adjustable lugs. The grid frame has its own earth terminal. MK grid
backboxes (flush n surface) have two fixed lugs since the grid frame
provides an adjustable one.