Knee Cap (with Rigid Hinge) a versatile device which offers the advantage of compression around the knee and the support of a side splint, while allowing normal flexion of knee. Hinged knee braces have rigid metal supports down the sides of the brace to provide maximum lateral protection. They are good for protecting and supporting the medial and lateral collateral ligaments. They are also suitable for cartilage tears and cruciate ligament ruptures.Whilst providing the highest level of support, these braces also allow a very good range of motion. Most also have a hyperextension stop, meaning the knee cannot be straightened past 0 degrees (or hyperextended).If you need to limit the range of motion (for example following surgery for certain injuries) this can be achieved with a brace that has a pin-stop mechanism. These work by using small pins on the hinge, which can be adjusted to vary the amount of flexion or extension permitted.