I designed this mini screwdriver after scrolling through Instagram and seeing a bunch of those EDC tools.  I took it on as a challenge to see if I could design one myself and 3d print it.  I present to you the Mini Screwdriver. For the bearing I decided to use a 608zz bearing since I had a bunch laying around and I figured most others do as well.  Standard ¼" bits fit into the end of the screwdriver held in by a fairly snug fit and a magnet. Check the parts list below for everything in the build, I also included a half section view for assembly purposes. 

BOM

• Mini Screw Driver
• Mini Screwdriver Bearing Spacer
• Mini Screwdriver Bearing Cap
• 608zz Bearing
• M3 Heat Set Nut
• M3 x 16mm Socket Cap Screw
• 1/8" OD x 1/16" Thick Round Magnet
• Glue (For backside of magnet)

The mini screwdriver can be used with or with out the cap. I also included a stand for organizing and displaying the mini screwdrivers.