Digi-Flex LiTE™ develops isolated finger strength, flexibility and coordination as it builds hand and forearm strength. Each finger button can individually lock. Each button has a single spring that is covered by plastic sheath. Use each button independently to exercise fingers or compress the entire unit for complete hand and forearm strengthening. Can be used for tip-to-tip pinch, hook position, trigger pinch, gross grasp, key pinch, and fingertip flexion.