This is a repacement handle I made for my Kärcher K 6.85 because the original spool handle broke. It's a one piece print with a rotating outer piece and it's very comfortable.
This handle can also be seen as an upgrade to the original one as it's more comfortable and stronger.
Print with handle grip facing upwards(standing up)
Print with many perimeters(5 or more) as this will increase strength a lot.
I printed ABS no problem on my Wanhao Di3+ but would probably work with ABS as well.