Three resistances to offer therapeutic treatment of the hand * The three colors identify resistances from soft to hard levels providing various rehabilitation and training programs for carpal tunnel syndrome de Quervain\'s tenosynovitis stroke and other diseases * Helps train flexor and extensor muscles of the digits hypothenar and thenar muscles plus lumbrical muscles * Ideal program to effectively improve strength endurance and coordination of the hand * The ergonomic design of the curviform shape allows gripping in any position * The center chamber and indentation curve design conforms to the palm and fingers * The wavy pattern of the center component fits the position of the fingers and makes it easier to grip without slipping * Gripbuddy is made of 100% Medical Grade Silicone which is oil-based non-toxic and safe to use