arm strength hand gripper blaster machine expander forearm power twist 20kg/30kg/40kg/50kg/60kg sport bar steel twister wrists chest shoulde

create the perfect figure for you: the power twister bar is a portable training device that is ideal for home, office, gym or travel etc. how to use arm strength equipment correctly: 1.two arms that are springy after the neck. two arms forward and up bend spring and then relax. 2.two arms on their chest bending spring and then relax straight down. two feet stand apart. 3.bend the right elbow with the left hand bending spring and then bend the left elbow with the right bending spring. 4.behind two arms to hold the spring and then straight downwards. package dimensions:15.75*1.97*1.97 inches; 1.54 pounds