Theres a compliant joint in the hole which grabs the screwdriver when you push it into the hole.
It's stong enough to hold the weight of the screwdriver, but still pretty easy to get it out.
Meant to be integrated into another design.
Shoutout to MINIWARE ES15 Model by PJ R | Download free STL model | Printables.com for the great model.
The author marked this model as their own original creation.