This is a connecting ring to allow the US General and Kobalt mini toolboxes to be stacked. The lid can be opened, add the connector, stack another toolbox on top.

UPDATE: I added a version 2.0 for those that want to modify their toolboxes and remove the bottom lid. This would allow this shorter piece since the lid will no longer interfere with the top lid opening. If you don't want to remove the lid, you would still use 1.0 versions.

Note: The base in the photo is listed as a separate model under my profile.

I created a split version for smaller printers. I have not printed or tested the split version.

-- Printed without supports, both inner and outer brim is recommended. Increase walls to prevent the infill from showing.

License: Attribution-NonCommercial 4.0 International