http://tinyurl.com/lbq5ddt

CFF Pit Bull Super Vise Gripper

84 points of adjustment will insure a strong grip and forearm growth (as long as you use it)

Heavy Knurled aluminum handles for a stable grip

3 Heavy Duty Springs for building a crushing grip and massive forearms

45 - 500+ lbs. of pressure

Included chart depicts only 2 springs, you can add the third spring to add to your resistance