Then the lock and

The third method of installation is the through method by the door leaf. The box is placed on the door leaf, then the lock and two detachable loops are inserted. Using three to six points of mounting, a door block, using this method under the return bar of the lock and loop, is mounted in the opening. Using wedges made of wood, the door block is made in place and filled with mounting foam. A small minus of this method is insufficient fastening strength in three places.