Handmaster Plus is used to prevent & treat grip imbalance, carpal tunnel syndrome, tennis elbow, golfer's elbow, cubital tunnel syndrome, RIS, tendonitis, DePuytren's Syndrome, DeQuarvain's Syndrome, arthritis, osteporosis, stroke, diabetes, and many other imbalance, nerve and circulatory concerns. Handmaster Plus strengthens and balances all 18 muscles of the hand, including the 9 that open the hand and the 9 that close the hand. Used by athletes in golf, tennis, basketball, football, hockey, gymnastics, BMX, extreme sports, ATV, motocross & bowling; musicians in guitar, piano, wind instruments (trumpet, sax, flute, etc.) drums & percussion and DJ and workers like dentists, surgeons, cashiers, production and assembly line workers, tradespeople, hairstylists, beauticians, chefs & bartenders... anywhere where ther eis grip there is imbalance...use Handmaster Plus www.handmasterplus.com