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The size of a tennis ball, the Powerball Gyro sets it in motion with the cord provided. The ball then comes alive with gyroscopic forces! It's your job to calm it down using the strength in your arm and wrist. The Powerball thrashes and jerks in your hand, spinning faster and faster until it reaches almost 15,000rpm! As a result, its concentrates the arms, shoulders and wrists, which make it an ideal aid for virtually all athletic activities. Keen golfer you may find it particularly useful as it provides a wonderful way to strengthen the arms and shoulders before competition.
