Erduoduo Hand Grips For Strength Training,Soft Foam Hand Workout Grippers, Strengthen Hand Grip Exerciser,2 PackSIZE135x85cM53X35Inch Spring Tension:20-25Kg Applicable groups : -Office crowd Working in front of the computer for a long time can cause sore hands Using our gripper can relieve the soreness of the hands and promote blood circulation in ..