Question about Digitus Universal Single Monitor Clamp Mount

As long as the screw-on interface fits, it works for all sizes...

The manufacturer states in his description, max. 8kg, 32". All is clear I think. Personally, I use it with a 27" screen and it does the job. For a 34" size, the weight will be too high, the structure of fixing to the desk is in my opinion not solid enough. I advise you to go for a higher model, like this one: https://www.digitec.ch/fr/s1/product/arctic-z1-basic-tables-38-support-de-moniteur-6026813.