Finger extension and hand strengthening exerciser. Each of the individual finger extensors can be independently positioned to achieve three different levels of resistance. The one sided activity that is reflective of the work performed by the hands in everyday life can now be counterbalanced by The Xtensor with continuous tension applied to opening the hands using an optimal line of motion replicating the exact opposite movement to closing the hands. The unique thumb positioning allows The Xtensor to be used on either hand.