There are not many exercise tools for rehabilitation of the hand function and they are not very sophisticated. The E-cone fills this gap and is a tool for the rehabilitation of persons with reduced hand function and allows to maintain the ability to work.
More about E-cone

The E-cone is a device for rehabilitation of the hand function in physiotherapy, occupational therapy and (work)rehabilitation. The objective is to support a patient to achieve better hand coordination and improve the muscle balance in the hand.

The E-cone can be applied as a tool in physical and occuoational therapy, rehabilitation and reintegration settings.

Shortly, patients can practice with the E-cone in physical and occupational therapy and rehabilitation companies.
"The e-cone is at Reade used as an evaluation tool of hand function. We work with patients who have impaired hand use."