A female locking post for the free end of a folding closure section, with an inner side for connecting the post to the free end, and an outer side opposite the inner side. Two opposed connecting walls connect the inner and outer sides together. An interior wall, spaced from both the inner and outer sides, extends between the connecting walls. A post opening, preferably extending the length of the post, is provided in the outer side between the connecting walls providing access to the interior wall. An operator with a lock bolt is movably mounted on the interior wall, the operator movable along the interior wall between an unlocked position where the lock bolt is within the post and a locked position where the lock bolt projects from an end of the post. A folding closure incorporating the female post is also described.