|Level 0 (Beige)|
Beginners, stroke patients, persons with serious hand injuries, establishing range of motion.
|Level 1 (Yellow)|
Children, geriatrics, beginning strength programs, athritics, carpel tunnel.
|Level 2 (Red)|
Most popular for all around use - such as strengthening, flexibility, injury rehabilitation, sports, fitness.
|Level 3 (Green)|
For more advanced rehabilitation, sports, strengthening, fitness, injury prevention.
|Level 4 (Blue)|
Sports strengthening for all major sports - for those that want to build real strength, very popular for pro sports training.
|Level 5 (Black)|
A real challenge for advanced strengthening, used where hand strength is vital - such as karate, weight lifters, golf, baseball, football.