Basic bit holder for 10pc 4mm hex bits.

There is a retainer bump in the middle of the socket, to make it less depending from printer tollerance and filament caribration. The bit insertion can be harder at the first couple of times

Be sure to print the Outside wall first, otherwise the Hex slot can be printed smaller.

You can print the Test.stl to check the fit.

The STEP and Fusion360 files are also here.