Here is my rendition of a knurled spinner using Fusion360 in three different sizes. I also included finger holders in three different varieties, all using a threading mechanism.
If you'd like me to print one of these spinners for you, please visit my Etsy store:
https://www.etsy.com/shop/3dPrintPig
The author marked this model as their own original creation. Imported from Thingiverse.