SUPER RESISTANCE -Different from other gripper, our trainers have greater resistance. Every spring is 200 pounds of resistance,up to 6 springs can be added, with a maximum resistance of 1200 lbs. Therefore, this stretcher is more suitable for people who need to further hand exercise and strengthen.Improving grip power on deadlifts, weightlifting, pull ups, and CrossFitTARGETS THE FOREARMS, WRISTS, & FINGERS Develop your forearms and wrists with this exercise equipment thats designed to target the flexor and extensor muscles in your arms. This gym equipment also strengthens the fingers to increase your grip strengthADJUSTABLE GRIP Designed for adjustable grip allowing you to create the perfect fit for your forearms, the grip ensures precise targeting of the muscles in your arms, guaranteeing each muscle group receives enough tension to facilitate developmentPORTABLE - This ingenious strengthener measures11 inches in length, 6 inches in width,2.8lbs. Its compact structure allows you to easily and conveniently store it at home without taking up too much space