You've just found one of the most Powerful and most Unique sports instruments on earth...
Powerball increases grip strength, improves your arm speed, develops your power with faster tennis serves, and longer golf drivers. Powerball is great for sports such as Golf, Tennis, Squash, Rugby, Badminton, Cricket, Rowing, Martial Arts, Boxing, Climbing and Basketball. Powerball also helps musicians gain stamina for concerts and also aids dexterity when playing.
