One piece clubs are made entriley from plastic and the handle is the same material as the body.
This model from Juggle Dream has a nice euro design on it a large knob making it good for club swinging.
The advantage of a one piece club is that they are very robust and almost impossible to break. The downside is they are not so comfortable to juggle with a bit lighter than a standard model meaning they don’t juggle outside so well.
The price is per club.