Daily strengthening based on spring resistance Strengthening device for effective strengthening of fingers and wrists. You can practice with these pliers every day. Strengthening works on the basis of spring resistance and thus guarantees a natural resistance to exercise. Variable resistance and ergonomic handles allow for effective finger and wrist exercise. EXERCISE WITH JOY! metal construction metal pen, plastic handles) Height: 11.5 cm Handle length: approx. 8 cm Contains 2 pieces (1 pair)