finger exerciser

Digi-Flex Hand Finger Exerciser

Yellow (Extra-Light) 0.7 kgs of hand force needed to compress Red (Light) 1.4 kgs of hand force needed to compress Green (Medium) 2.3 kgs of hand force needed to compress Blue (Heavy) 3.2 kgs of hand force needed to compress Black (Extra Heavy) 4.1 kgs of hand force needed to compress