The HandMaster Plus hand exerciser helps strengthen hand muscles. The HandMaster Plus can be used to treat carpal tunnel syndrome, tennis elbow, golfer’s elbow, RSI’s (repetitive stress injuries), tendonitis, DeQuervains’ syndrome, Dupuytren’s contracture, osteoarthritis, osteoporosis, stroke, neuropathy, post-surgical rehabilitation, sprain/dislocation/fracture rehabilitation, subluxation and adhesion, and circulatory concerns.