Door latch model 843ZY, The effeff door latch 843 allows a wide range of installation options thanks to its compact design and well thought-out accessories. As an additional door latch, it offers optimal security in both commercial and private areas., For horizontal and vertical installation, When installed horizontally, only downward closing is possible, Surface mounting also possible on glass doors, Automatic unlocking for 8 seconds via integrated control, Integrated door and locking monitoring contacts, Suitable for short-term and permanent release, Suitable for revolving and swing doors, For the latch to function, a corresponding strike plate with a magnet for door status detection is essential