Google Nest Protect smoke alarm centralbox mount

Google nest protect smoke alarm mount and adapter plate to mount your smoke alarm to the centralbox of your ceiling.
it's meant for centralboxes with a pitch circle diameter of ø78 +/-2mm

This way you can mount your smoke alarm right to the centralbox without drilling in your ceiling.

Requirements:
4x Nut M4
4x Screw M4 of desired length to reach the centralbox
4x Sunk head screw M4x6