If you've never seen it before, you're probably wondering what the Fat Gripz is and what it's for. It's a very simple device that can be quickly clamped on barbells, dumbbells, chin-up bars and cable attachments for a thicker grip that forces your forearms to work harder just to maintain a good grip. Four-time Mr Olympia Jay Cutler uses it regularly in his workouts and so too do a lot of other professional athletes in the NFL, MLB, NHL, and MMA. Working out with thicker bars can increases strength and muscle gains, especially the forearms, and makes certain workouts easier to do with good form. In fact, you are guaranteed to feel the impact in your first workout or you get your money back.