This 3D printed Power screwdriver is an quick demonstration of what 3D printing can achieve.

The complete outer shell of power screw driver is 3D printed except for internal electronics .Electronics is extracted from off the shelf power screw driver and assembled into 3D printed shell.

You can view the working using the link below https://youtu.be/blEDwpC6Fbk

Print the downloaded STL file's at 100 micron resolution.
Use pillar structure as support making it easy to post process.