Jump rope handles sized for three year old child. You can make Your own size in the source files ( fusion 360 ) or send me a request and i will try to modify it for you. The handle has hollow compartment for beefy knot.

I used 6mm braided PVC cord as the rope.

The threaded part must be printed with low layer height to function. You can use the presliced gcode ( with adaptive layer height ), this has some visible artefacts due to different layer height through the print. 

Or print the whole thing in lowest layer height you are comfortable with.

Layer height around 0.15 and lower should work.

Supports ( build plate only ) are required for the cap, try to avoid supports on the threads ( they should not be necessary ). Cleaning supports from the threads will be unpleasant work.