4″ X 1″ X 1″ corner brace. Glue or staple.
1″ X 3/4″ X 3/4″ Corner brace – screw on.
Corner Brace 2-1/2″ X 2-1/2″ X 3/4″.
1-1/2″ X 3/4″ X 3/4″ heavy duty staple brace. Has thicker-than-standard walls.
3″ X 9/16″ X 9/16″ corner brace.