This is a gridfinity organizer bin for a standard set of countersink bits on ¼" hex quick connect driver ends. The raised lettering can be colored with a filament swap at the right layer, or simply painted or sharpied like I did.
The author remixed this model.
Based on the Gridfinity system by Zack Freedman and bases created with the great plugin for Fusion 360 by Lev Mishin.