The CDL venetian blind blends very well with the overall appearance of a building thanks to the particularly flat and spare design of its comfort and design slats. A special feature is that the essential punching of each slat is hidden. What is more, the typical light gap between slat and guide rail is closed due to the distinctive form. The uniform shadowing gives an interior a calm atmosphere. Normally, mounting holes are visible on the front of the guide rails. However, they are concealed by the second part of the guide rail.