Designed to help eliminate body function disorders, problems that limit activation or prevent participation. It aims to increase joint mobility, improve hand-foot dexterity, and increase endurance. Length, length, and rotation speed can be adjusted to your liking. Our product will be shipped with an invoice in your name. For returns and exchanges, the INVOICE must be sent to us along with the product. The product box and all parts must be returned complete and undamaged. 100% Customer Satisfaction.