A femoral trial component (16) for attachment to a prepared distal surface of a femur, the femoral trial component comprising a first fastening point (20) for coupling the femoral trial component to a tibial cutting jig. The femoral trial component may further comprise a second fastening point (21) for coupling the trial component to a tibial cutting jig (25), the first and second fastening points being at a predetermined angle (e.g. substantially 90 degrees) to one another. Advantageously the trial component may also have a cut-out region (17) for accommodating an anterior cruciate ligament.
