FOSBOS is an completely free organizational system, every model is open sourced including both fusion 360 file and the step file. All the drawers are designed after the gridfinity standard.
This model is a bin for storing your super screw scrubber that fits in any of the drawers that is at least 2u high. This model does not actually contain the super screw scrubber itself, it can be found here. The model includes 5 different sizes, 1x3x2u, 1x3x4u, 1x3x6u, 1x3x8u and 1x3 x10u.
Please have a look at the assembly model(here) for more information