This is a tool drawer insert or a parts tray.
Its just a box with the option of a internal arc on the front wall or all walls.
No ramps mean that it has maximum space inside.
Front ramp means that it is easier to get things out.
All ramps mean that it is much easier to get things out.

Put a bunch of them in your toolbox drawer to keep all your bits sorted, or build a couple as mini parts bins.
I have several free ones, and a couple of toolbox drawers that are completely filled with a combination of sizes.

Made with OpenSCAD.
My first customisable !