THROW PRACTICE: Great for practicing outdoor.
STURDY: Lathe turned ball with bearings and steel handle.
SWIVEL: Free spinning swivel helps with speed and control.
WEIGHT: 12lb, 16lb, 18 lb, 20 lb,23 lb,25 lb, 28 lb,30 lb, 35 lb, 40 lb,56 lb
Available in various sizes.