CanDo Via hand exerciser develops isolated finger strength, flexibility and coordination as it builds hand and forearm strength. Soft finger pads and palm rest with an ergonomic design that's non-intimidating and appeals to children and seniors. Progressive color-coded resistance gives patient positive feedback. Also builds hand and forearm strength. Blue, heavy - Finger ( 5.5 lb) / Hand (22.0 lb), Black, x-heavy - Finger (7.0 lb) / Hand (31.0 lb)