Ultraflex Elbow/Knee Range of Motion Dial Joint is useful for making custom supports for ankles, knees, wrists, and elbows to help with neurological spasticity and orthopedic recovery. These supports are meant for therapy, not for walking. Materials: Joint: Made of aluminum bars (5052-H34), with stainless steel nuts and screws for locking. Finish: Aluminum coated with epoxy powder. Range: Can move from -0 to 160 degrees. SectorLock: Any part of the range can be locked for restricted movement.