Meet the ThunderBell: a multi-grip weight that can replace a dumbbell, kettlebell, and medicine ball. The 7-grip design lets you try various cardio and strength-building moves in the gym. ThunderBell engages more muscles in your body and allows you to keep your body guessing.
More gadgets like this: here
ThunderBell - Burn More. Build More. Get There Faster.
As you can see in the above video, ThunderBell facilitates dynamic movement training to build strength in your body. It is available in 6-, 10-, and 15-pound versions.
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