This spool holder requires:

• 4x 608 bearings (common skate bearing size) 
• Glue, such as super glue.

All parts are designed to print with no supports, but screws may need a brim if bed adhesion is an issue.

1. Glue covers on each side with bearings in place.
2. Glue screw A to screw B.
3. Thread Side A on to Screw A
4. Thread Side B on to Screw B.