The 3R93 prosthetic knee joint is especially well suited for transfemoral amputees with limited walking ability and a high need for safety. Thanks to its special design, the 3R93 can be used as a locking knee joint and as a knee joint with friction brake once the mobility of the user has improved. It thus effectively supports the therapy process following the amputation. The functional design features a covered joint gap, so that the cosmetic cover is protected even at the maximum flexion angle and a highly natural knee shape is achieved. It is a modern prosthetic knee joint that achieves outstanding harmony between functionality and design.