Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4664721.
This is a X Y hotend offset calibration. It's very simple to use.
The part with number is your reference and need to be first nozzle.
The 1mm and 0,1mm offset will tell you how far is tour nozzle. you need to see where lined up and need to be your second nozzle.
There are number and signals to inform you how much you need to add or remove of the offset.
To calibrate Y axis you need to rotate 90° counter-clockwise, and the process is the same as X axis