Imagine crushing walnuts with your bare hands....or crushing full cans of Solo lemonade as it was done on the TV. Pretty cool party trick hey?

More seriously it is also ideal for martial artists, climbers, golfers and anyone else who wants to improve their hand and forearm strength.

This heavy hand grip takes 300lbs (136KG) of pressure to close, which is going to make your hands, wrists and forearms pretty strong after a while of training.

Professional level is suitable for those who are beginning grip training as well as for younger athletes, female athletes, athletes with small hands and warm-ups for stronger athletes.