Stainless steel spring. The short leg is secured between two layers of ORFIT Classic. The long leg is bent to size and cut to length. At total finger flexion the spring is tightened up to a torque force of ca. 2 000 g.cm. The spring is especially designed for finger extension assists (to assist the weakened digital extensors; eg. Radial Nerve Palsy) in combination with the ORFIT splint (ref. #35818 to 35822).