. Main construction on the door and case, in contact with each other 
. Wooden material is used between them
. Case is single part anchorage from the interior and exterior
. A metal blind case is welded between the wall and the case
. Lock pins have been released in the case gap
. Lock counterparts on the case have been strengthened with extra steel
. Lock frame on the case has also been strengthened with extra steel
. A steel rosette is used to prevent armature from breaking