A distal femur cutting block comprising a first portion defining a first external surface, the first external surface including one or more first passages therethrough； and a second portion defining a second external surface, the second external surface including one or more second passages therethrough, the first portion hingedly connected to the second portion, wherein the first portion and the second portion may be rotated relative to each other through the hinged connection； and a third surface opposite one of the first surface or the second surface, the third surface comprising contours configured to substantially mate with at least one condyle of the distal femur.
