I've gotten pretty good with my 1 lb Indian clubs so I just bought a pair of 5 lb Clubbells. That's a pretty big jump in weight for a club. A 5 lb Clubbell feels surprisingly heavy because of the leverage. I'll have to go slowly with these, but I'm excited. This is all uncharted territory for me, so we'll see what happens.
Here's what a Clubbell looks like:
http://www.clubbell.tv/ A 5 lb Clubbell is the smallest. I'm not trying to be a hero here. I think they go up to 45 lbs.