Abstract: A device for enabling a surgeon to make bone cuts in performing total knee surgery which includes a femoval assembly adapted to be mounted on a femur, and a carriage assembly connected to the femoval assembly and pivotally adjustable relative thereto about two axes which are transverse to each other and to the femoval axis. The carriage assembly is also adjustable longitudinally of the femoval assembly and includes a saw carriage slidable thereon. The saw carriage supports a powered saw. The parts are adjusted and locked in several sequential positions and the saw carriage and saw moved to make all the knee surgery cuts.