Grip under the hand of the shape and design, using time division one hand , hands , hold on , hold down double clip , such as different training methods. With a small and light, easy to carry , when used without any restrictions , ready to exercise your hand strength , relieve fatigue , the use of muscles, strong muscles, increase blood circulation, long-term use in the prevention of rheumatoid arthritis and other help, exercise fitness is an essential small equipment .