This is a modular magnetic wrench organizer with colored labels. There is a hole in the bottom of the model that is meant for a 5x10x20 neodymium magnets (https://www.amazon.com/dp/B09LYBBQDL). Simply press the magnets into the base, and they should stay. If you plan on moving your organizer around alot, you should use a dot of glue as well, just to make sure tha magnet stays in place. Generally, it should not come out unless you are sticking it directly onto a magnetic surface. The model includes colored labels, in both imperial and metric. Simply delete any organizers that you don't need. The organizers snap together with some force, especially if you are using non-bambulab filament.