This model is meant to hold EEEEE brand electronics component kits that are available on Amazon and elsewhere, as shown in the picture. It allows you to easily see each kit and pull the one you need without having to move the others.

The hole spacing is designed to be used with Multiboard, but it can also easily be screwed into any solid surface instead. It can be attached using any of the pre-existing nut snaps. I used the “Mid-Print Nut Snap - M5,” but smaller nuts would work just as well.