This article concerns:
- Smart Lock Ultra
- Nuki Universal Cylinder
The yellow toothed adapter is designed to protect your Smart Lock. When excessive manual force is applied to the knob, the Smart Lock could be damaged. Therefore, if the adapter breaks, it has fulfilled its protective function.
Please contact support to receive a new adapter free of charge.
Once you have received the new adapter, make sure you insert it with the protruding side first.