The SpinFaktor HG Heavy Gravity featured rim weighting like YoYoJam's composite body models, but was an all plastic model. The rim plastic was made much denser than the rest of the yo-yo by adding heavier particles to the mix.
YoYoJam released this model on April 15th, 2005 to fill a gap in their product line. They had a number of lower priced plastic models, and higher priced metal rimmed models, but this one was designed for the middle price range.
