These clubs weigh only a pound or two and they are often used for weighted joint mobility workouts, but some say they are also very useful for recovering injured shoulders and finally we shouldn’t overlook the coordination benefits of Indian clubs workout.
Other than that, they really do not have that many benefits. Those can be huge to the right person, but having played around with them for a number of years I think your time can be better spent then with 1 to 2 lb. pieces of wood.
In his book Indian Club Exercises, Sim Kehoe pointed out that except from invalids, women and children, you should be using something heavier in range of ten to fifteen pounds which will give you much more benefits in terms of strength, leverage factor and even better coordination. I agree with his opinion.