Adjustable and portable handheld exerciser

Disclosed is an adjustable and portable device for exercising the hand, fingers, wrist and forearm. Any number of mechanisms by which the device can be fully adjusted through a range of force settings allows both rehabilitation and strength training within the same unit. Using combinations of screws, springs, tension and fluids, this exercise device provides the user with versatility not offered by other products. The unit also provides a mechanism for adjustments in hand size to accommodate multiple users and ergonomic fit. In addition, the unit also has the benefit that it can be repaired or resistance increased when some of the key mechanisms are no longer functioning to the operators needs