Hinge Knee Cap, a knee cap (with Rigid Hinge) is a simplified but effective design which offers the advantage of compression around the knee and the support of a side splint. It allows normal flexion of knee. Anti tourniquet strapping, good de loading. Free flexion movement. The hinged knee brace stabilizes the knee joint and keeps the bones from moving around too much. It can keep the four main ligaments of the knee from working as hard and may control your range of motion. It's commonly used for tears in the knee.