Lf you suffer from rheumatoid arthritis arthritis carpal tunnel tendonitis tennis elbow and are on the way to recovery from a fractured or broken wrist or tendon surgery then this is the perfect gripper for you Nine- hole multi- range adjustment: It can be used by old people adults and of all ages. can activate the nerves and promote brain development. The elderly can stimulate the nerves and promote brain health Our finger extensor exerciser has a small size and modern looking. You can use it while walking traveling(car airplane bus) in office school watching TV or any place you want to exercise