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.