Question about Nuki Smart Lock PRO (5th Gen) CH cylinder

Yes, the product fits a Swiss Keso lock with a special red adapter. Whether inside with key or knob, it works with knob cylinders like Keso, but check the cylinder overhang (<6 mm) and key width (≤4 mm). Compatibility with older adapters is not guaranteed for the 5th generation, use the Nuki compatibility check.