These CanDo Graded Pinch Finger Exercisers are replacement pinch pins that would be used in the complete set. They are designed to build hand and finger strength and are utilized by patients recovering from hand injuries or individuals with disabilities. Users can use the pinch pin exercisers in several ways to help improve dexterity, grip strength, and fine motor coordination. This set is ideal for a variety of applications, including sports facilities, physical therapy centers, clinics, hospitals, and retirement homes. The progressive resistance of each pinch exerciser is easily identifiable based on color and are perfect for gradually increasing the difficulty of the exercise. This is a set of 5 Black pinch pins that are X-Heavy in resistance. The perfect resistance level for those who have built more strength in their hand and fingers and are ready for the challenge.