You might need to replace upvc door lock; http://periochina.co.kr/web/bbs/board.php?bo_table=bulletin&wr_id=3543, your current uPVC door handle if it is worn out....
You might need to replace upvc door lock; http://periochina.co.kr/web/bbs/board.php?bo_table=bulletin&wr_id=3543, your current uPVC door handle if it is worn out....