3″ X 3″ X 7/8″ corner brace
3″ X 1″ X 1″ corner brace
3″ X 9/16″ X 9/16″ corner brace.
5/8″ X 5/8″ corner brace.
3-1/2″ X 3/4″ X 3/4″ corner brace. Screw in place using #8 panhead screws ( not supplied )