GD IRON GRIP Hand Grip Strengthener (Grip Strength Trainer) Premium Forearm Strengthener (EXT.80 - 55~176lbs, With Handle Extensions) Adjustable Hand Gripper for Grip StrengthOwning the Iron Grip Adjustable Gripper 80 EXT is like owning six separate metal hand grippers. This single gripper provides resistance from beginning to professional levels.S..