DeWalt Plastic 10-Compartment Deep Pro Small Parts Organizer Divider

DeWalt makes these organizers with slots for dividers but doesn't include or apparently even make dividers for them so here you go. This divider will fit tightly into the bin and nests with the anti-slide divot indents on the lid to minimize parts moving between divided spaces.

I've included dividers for both the large and small bins but I've never printed to test the large bin divider because if you're going to divide a double-size bin in half you may as well use two smaller bins and save the large bin for large things.

OpenScad file is fully parameterized if you want to customize it.