Grenadier Grips Dumbbell Grips helps to explode with muscle. It is easy to use and install, Grenadier Grips helps to alleviate wrist, elbow, and joint pain. Grenadier Grips measure approximately 3” in diameter 73mm, or about the size of a baseball, tennis ball, or cricket ball. They are specifically and ergonomically designed to fit perfectly in the palm of your hand, allowing for comfort during training. The Grenadier Grips are here to help you gain in all the right places.