Metal was my second and third and fourth and fifth and probably even my sixth although I think that one was a silicone.
Why was metal next, because I could get it. Then I started to really like it. In a lot of my Early Videos I used Metal. They were small and heavy and created a different way to move the prop around.
Metal has always been fun to play with even early on
These are Chinese Excercise Balls or Baoding Balls or those metal balls or chimey balls.
These are a bit small in my hand. Right now I like to use 55mm to 63mm(2.2" to 2.5")