This is an adjustable tool to help you easily create monkey fist knots. To adjust for the size of the marble in the middle of your monkey fist, you can simply unscrew the caps on the bottom, move the rods, and screw the caps back in.
To learn how to make a monkey's fist, I recommend this tutorial:
I did not make this tutorial
I did not make this tutorial!
Boost MeEvery single time you boost me, I get about 50 grams of filament. That means if you boost me once, I can print this model, and still have 15-20 grams left over.