We have an old rusty farm/barn ?hook.  It has the screw with an eyehole on one end fitted into a longer shaped piece on the bottom.  This may have been handmade as the metal is a bit uneven in places.  The top screw piece measures about 4" in H with the longer piece attached through the eyehook measures about  8 5/8" in L x about 1 1/2" across the eye of the hook.  We are assuming this was used as a tie down of some sort.  It is completely rusted.

Rusty Hook Farm or Barn Antique