These 3D printed fidget bolts designed by ThinAir3D are the perfect fidget toys to keep in your car for red lights, packback for the bus rides, or for ignoring your annoying little brother on car trips.
 
They are roughly an inch in diameter and four inches tall.
 
Note: If the bolt on your fidget doesn't spin on its own, keep playing with it! Sometimes they need a little extra use to loosen them up.
 
Disclaimer: Jurassic Park Ranger status and Mike from That Chapter not included.