This is a remix of @OlleMark Allen key handles https://www.printables.com/model/620223-allen-key-handles I wanted a bit driver to match the set.

Because this is based on @OlleMark‘s Allen key handles I tried to stay as true to the original design as possible to make this fit in as a part of the set. It turned out great and kinda works like a big iFixit driver. Works well with a ¼ - 4mm adaptor too. Nice big ergonomic precision screwdriver for my ham hands. 

                                                          Stubby version coming soon! 

Needed Parts:

608zz bearing

Bit extension of your choosing. (I used a 4” magnetic)

Optional- 5x2mm magnet.

Assembly:

Screw the end cap onto the thinner end of the handle. Screw the bearing cup onto the wider end of the handle. Press the bearing into the bearing cup. Press the button on the bearing. Add a bit extension into the open hex hole. Depending on your printer setup you may want to CA glue or epoxy the bit extension into place.

Print settings are the same as the original.

25 % infill 5 walls Print a little slower for the threads Orient parts in your slicer as shown in pictures. no rafts supports on the button.