Angle Bit Holder

This is an angle bit holder for screwdrivers with which hard to reach places can be reached.

All you need are 4.5mm (cal. 177) steel round balls, one 4mmx8mm magnet and some glue.
All other parts, even the ball bearing are printed.

Part list to print:
1x 0010_innerring
1x 0011_innerring2
2x 0020_outerring
2x 0040_cage
1x 0050_case
1x 0060_gear1
1x 0070_gear2

After all components have been printed, 9 steel balls must be placed in 0020_outerring. The ball bearings are printed individually and then inserted to ensure the best possible concentricity.
This is a bit awkward and you will need some patience.
After that, the inner ring is inserted.
Then the mounting ring must be inserted so that the balls can be distributed with a screwdriver.
Then 0040_cage must be inserted. This fixes the steel balls and you have succesfully mounted the bearings!
Finally, the gears must be inserted into the ball bearings and the bearings must be glued to the case.