This is gridfinity storage for Midifi3d Pro tool.
Modifi3d Pro can be bought here: http://modifi3d.co.uk/
This is a contribution to Zack's gridfinity: https://youtu.be/ra_9zU-mnl8
I have included the Fusion 360 file, f3d, if you want to modify it.
The author marked this model as their own original creation.