Alfit Co., Ltd. Knee Supporter OA GX For Left Knee Size M From the manufacturer's catalog: This knee support uses a three-point support system with rubber straps and offset joints on the inner and outer sides to support the knee joint. - Aluminum offset joints on both sides - Three-point support structure - Easy to put on and take off with finger holes This is a new, unused item, but the box has been discarded. Therefore, only the knee support itself and the instruction manual will be shipped. Please purchase only if you understand this.