A prosthetic acetabular cup inserter and impactor comprising a body, and a cup engaging element disposed at a first end of said body and adapted to engage an inner surface of a cup with which it is used via outward biasing thereof, in which said cup engaging element increases in cross-sectional area from an inner end thereof to a fullest transverse section, and decreases in cross-sectional area from said fullest transverse section to an outer end thereof.
