This adapter is to enable owners of the HF General 5 Drawer roll around Tool Chest to be able to store 3/8" ratchet extensions in the top storage area ratchet storage holes. The holes easily accept 1/4" and 1/2" sizes, but the 3/8" size will just fall through to the bottom shelf. This adapter will accept up to 4 extensions of various lengths.
Use the parameters in the STL print section. No BRIM required for proper adhesion.
The author hasn't provided the model origin yet.