Grippy Fidget Spinner cap

thingiverse

A custom end cap that leaves a little bit of space for your thumb and index finger to sit in while spinning the fidget spinner. Print two, one for each side. This is best done with the finger-gripping part facing up. That way, you'll have more support material. However, it will be easier to remove if printed this way. If instead, you print it with the 'finger-gripping' part down, the support material will be hard to take out and your fingers won't touch a beautifully finished surface.