Just a little piece to hold a 12mm sensor for the bed auto-level.
Mine is a capacitive sensor.

You only need to remove the original brass thing and put this one instead.
No screws needed.

Be careful, with the sensor in place the Y axis can't go to the limit (see pictures).
I think I will create a remix for the Z axis holder with a little curve so that the sensor could go a little more on the Y axis.