#$%^&*AU2013200633A120130829.pdf#####ABSTRACT The invention relates to a femoral jig for use in knee surgery, said jig comprising a component shaped to represent the overall profile of a femoral prosthetic component of a specific side and size, and having extending therefrom an anterior reference arm said arm having a cutting guide located thereon. It also relates to a tibial replacement thickness spacer comprising a set of leaves and a tibial jig for use in knee surgery, said jig comprising a component having tibial plate and tibial posts extending downwardly from said tibial plate and an anterior reference arm said arm having a cutting guide located thereon. Kits comprising these components are also described. 19ti-iFigure 3 Figure 42W Ca