Right - as shown below there's an inner and outer on each side, but the pair is used both left and right side.
The seller claims this to be for a "no step" bumper, but it looks different, to me.
https://www.ebay.com/itm/1980-89-Ford-Truck-Original-Used-No-Step-Left-Rear-Outer-Bumper-Bracket/232738633437?hash=item36304db6dd:g:qpkAAOSwKFpa14P8