Improved instrumentb (100, 200) for modifying a shape of a proximal femur of apatient for installation of a stem of a femoral component of a prosthetic hipduring hip replacement surgery, comprising a handle (102, 202) including anelongated shaft (102a, 202a) extending downward approximately in a z-direction, a first offset (104, 204) extending from the first offsetapproximately in an x-direction, and a shaping member (101, 201) elongateddownward from the second offset approximately in the z-direction.
