It improves flexibility, coordination, and strength of individual fingers. It increases hand and forearm strength. Each finger button is individually locked. Each button has a separate spring and is covered with a plastic sheath. Using the buttons independently allows for finger exercise or compression; using the entire unit provides hand and forearm strength. Digi-Flex®, with its differently colored resistance levels, provides positive feedback for the patient by allowing them to transition to the next level color code as their strength increases.