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.
Red 50lb max resistance (difficult) for big guys or lower-rep strength training.
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.