Grip Pro Trainer is an extremely effective finger-hand-forearm strength and endurance trainer. This grip trainer comes in 3 different levels of difficulty:
Green-30lb max resistance (easier)-for lighter weight people and warming up.
Black-40lb max resistance (medium) for average weight men and stronger women.
How do you Use It? see instructional video
Grip Pro Trainer is very portable and easy to use, almost anywhere/anytime - at your desk, stuck in traffic, walking, on the treadmill, etc. Try 3 sets of 10-60 reps a couple times a week for best results over time. This hand grip trainer is also great for stress relief.