Can be worn on the finger of each hand, including middle, index, ring and pinky finger. Fit the circumference of finger or thumb up to 3.5" length. built-in aluminium support, effectively to immobilize the full finger knuckles, promotes healing and reduces pain and discomfort. Aluminum support is easy to install and remove. made of premium neoprene, covered with stretchable nylon and cotton fabric enhance its ventilation and comfort. Combination with adjustable straps, injured can adjust the size to fit their fingers. It is applicable to trigger finger, little finger injury, tenosynovitis,hammer finger, rheumatoid arthritis, tendinitis, finger curl after stroke, postoperative care, finger strain, cardiac duct syndrome, finger cyst and other finger injury caused by indoor and outdoor movement.