This remix was created for reasons when you use these compartments from the original model, for example in a drawer, but there is some free space left on the side.
These models are 20 mm longer in one direction than the source models: “Catch-All Trays / Desk organizer & Catch-All Trays / Desk organizer - stackable remix & Catch-All Trays / Desk organizer - height variants remix”.
It's a total of 436 stl models, that's why they are put in a zip file and in 3D models only a few models are stored for references.
The author remixed this model.