An adjustable femoral pin guide assembly includes a base and a femoral extension rod assembly. The base may be rotated to align with the femoral shaft axis while the femoral extension rod assembly aligns with the leg mechanical axis. An adjustable distal femoral cut guide assembly may be adjusted to provide a range of varus/valgus angles for the distal femoral resection. An adjustable, single-use, disposable four-in-one cut guide may be adjusted to position saw slots for the anterior and posterior femoral resections and the anterior and posterior chamfer cuts for various size femoral components, then locked. A foot holder assembly includes an anterior tibial target that may be adjusted in three dimensions relative to the tibia. A femoral sizing guide includes a sliding drill guide to position a pin in the distal femur in a specific orientation relative to the leg mechanical axis.
