As always I'm late to the party! Just found out about these and can't say how excited I am about getting one. The number of uses are, well, like most good things . . . endless!
Check it out, and be sure to watch the video up to the point where there's some full swings followed by full-force tosses. They're made of a material that can withstand being thrown (not only that but landing too, ah-yep, and of course can take a beating when banged together). Outstanding! Think of what you could do with these.