The Grind Mutant by YoYoFactory was a yo-yo birthed from a production mistake while manufacturing the Grind Monster. This yo-yo has a uniquely wide profile and is very heavy at 84 grams, which gives it an extreme playing experience.
A very limited model, only 24 of these yo-yos were ever manufactured. Twelve of these yo-yos were been sold to the public, while the rest were given out to family and friends, along with a few collectors and players.
In addition to the three response pad types seen in the previous yo-yos before it, the Grind Mutant also comes with silicone pads.