I separated into 2 version:
Custom color accent ring and spinning end cap
In this alternative version the screwdriver body is a single color (You can still do color swap. Nobody can stop that…) and the cap is fixed so it's simpler to print.
Bit with strong magnet → https://www.printables.com/model/583289
Case that holds 2 bit holder → https://www.printables.com/model/580067
Full size screwdriver SIMPLE → https://www.printables.com/model/580064
Full size screwdriver FANCY → https://www.printables.com/model/580045
The maximum supported length for the bit extender stem is 6 cm. Or 9,5 cm in total. It will protrude from the inside but don't worry it will not interfere with the bit holder.
The author marked this model as their own original creation.