A simple T-piece with a hole for a screw. Can be turned in order to “secure” / lock and unlock dual drawers (if there is some space between them). See photos, it's really simple and an extremely basic model that can easily be improved, if required.
Prints easily. I used ~50% infill, but it doesnt really matter. I also used PLA, but PETG and others will just as fine.
The author marked this model as their own original creation.