Edit: Added version without keychain addon

and my .blend file

A simple remix of the cool model by mirabatek.

My changes:

• uses M3 screws instead of M2
• chamfered edges instead of rounded (better suited for 3D-printing)
• open holes for GND pins in top left and right corners
• recess for underside pins and passives - now the STLink lies flat and is not rocking on the protruding parts
• recess near USB-Port for easier assembly
• loop for connecting ST-Link you your keys (use as keychain)
• slightly thicker walls

I don't know if all Nucleo Boards have identical ST-Links, but in case someone asks - mine came from L452RE board