1-1/8″ X 1-1/8″ corner brace.
3″ X 1″ X 1″ corner brace
3″ X 3″ X 7/8″ corner brace w/ screw holes
3″ X 3″ X 7/8″ corner brace
2″ X 1/2″ X 1/2″ corner brace