Genji ninja stars fidget spinner.
Made to fit a standard 22mm 608 bearing.
Also check out my marvel spinner pack (13 and counting) right here:
http://www.thingiverse.com/thing:2251424
Sorry for the design flaws in Version 1 and 2, V3 is the final version with added strenght to the blades and inner ring!
Genji_v3.stl | 1.0MB |