This Powerball Hand Exerciser is all the rage in Europe where hundreds of thousands of it have been sold. We stumbled upon this hand exercise purely by chance and have been reading all the raving reviews of our European counterparts. We wanted to find out what the fuss was all about. Because of our busy lifestyle, we don't have the time to hit the gym every day of the week. With this Powerball, you can do some exercise wherever and whenever you want. This convenience is also the main advantage of the Powerball. This product works wonders and it really seems to strengthen the wrists and forearms. Powerball is one of the most innovative hand exercisers, generating speeds of over 16,000 rpm! Simply by starting up the Powerball in your hand and rotating your wrist faster you can develop incredible speeds and increase your strength. It takes a while to get the hang of it but once you get going, you will find it hard to put it down. Powerball is seriously addictive! Powerball is merely the size of a tennis ball and weighs just over 8 ounces, it may look harmless enough, but this badass gyro can spin at an incredible 15,000 rpm and generate over 40 lbs of force - all of which is applied to the fingers, hands, wrists and arms of the user. No matter how fit or strong you already are, using the ball for just 5-10 minutes each day will unconditionally guarantee a substantial strength increase in the full muscle groups of the lower arm and wrist, within a very short time frame.