A prosthesis cup installation device, the device comprising: a) an impaction plate comprising a proximal surface spaced from a distal surface, a plate thickness extending therebetween and a plate opening extending longitudinally through the thickness; b) a first primary cup contacting member spaced from a second primary cup contacting member, each having a primary member proximal end spaced from a primary member distal end, the first and second primary members (26A, 26B) positioned in opposition to each other in a slidable relationship along the distal surface of the impaction plate, the proximal ends of the first and second primary members (26A, 26B) facing the impaction plate opening, and each of the primary member distal ends forming a first imaginary arc having a first diameter; c) a first secondary cup contacting member spaced from a second secondary cup contacting member, each having a secondary member proximal end spaced from a secondary member distal end, the first and second secondary members (28A, 28B) positioned in opposition to each other in a slidable relationship along the distal surface of the impaction plate such that the proximal ends of the secondary members (28A, 28B) face the impaction plate opening, and each of the secondary member distal ends forming a second imaginary arc having a second diameter, wherein the first diameter of the first imaginary arc is greater than the second diameter of the second imaginary arc; and d) a wedging assembly, connectable to a drive train positioned distal of the impaction plate, comprising a first body and a second conical body positioned distal of the first body, the assembly extending along a longitudinal axis (C-C) perpendicular to the distal surface of the impaction plate; wherein actuation of the drive train draws the wedging assembly, connected to a piston, in a proximal direction from a first position to a second position closer to the impaction plate than the first wedging assembly position, to thereby draw the first body and the second conical body in a proximal direction wherein the first body is in a contactable relationship with a proximal end surface of the first or second primary cup contacting member and the second conical body is in a contactable relationship with a proximal end surface of the first or second secondary cup contacting member, a distal surface of the first or second primary cup contacting member being contactable with an interior surface of a prosthesis cup or prosthesis cup insert at a first depth within the prosthesis cup, and a distal surface of the first or second secondary cup contacting member being contactable with an interior surface of a prosthesis cup or prosthesis cup insert at a second depth within the prosthesis cup, the second depth being distal of the first depth. a) an impaction plate comprising a proximal surface spaced from a distal surface, a plate thickness extending therebetween and a plate opening extending longitudinally through the thickness; b) a first primary cup contacting member spaced from a second primary cup contacting member, each having a primary member proximal end spaced from a primary member distal end, the first and second primary members (26A, 26B) positioned in opposition to each other in a slidable relationship along the distal surface of the impaction plate, the proximal ends of the first and second primary members (26A, 26B) facing the impaction plate opening, and each of the primary member distal ends forming a first imaginary arc having a first diameter; c) a first secondary cup contacting member spaced from a second secondary cup contacting member, each having a secondary member proximal end spaced from a secondary member distal end, the first and second secondary members (28A, 28B) positioned in opposition to each other in a slidable relationship along the distal surface of the impaction plate such that the proximal ends of the secondary members (28A, 28B) face the impaction plate opening, and each of the secondary member distal ends forming a second imaginary arc having a second diameter, wherein the first diameter of the first imaginary arc is greater than the second diameter of the second imaginary arc; and d) a wedging assembly, connectable to a drive train positioned distal of the impaction plate, comprising a first body and a second conical body positioned distal of the first body, the assembly extending along a longitudinal axis (C-C) perpendicular to the distal surface of the impaction plate; wherein actuation of the drive train draws the wedging assembly, connected to a piston, in a proximal direction from a first position to a second position closer to the impaction plate than the first wedging assembly position, to thereby draw the first body and the second conical body in a proximal direction wherein the first body is in a contactable relationship with a proximal end surface of the first or second primary cup contacting member and the second conical body is in a contactable relationship with a proximal end surface of the first or second secondary cup contacting member, a distal surface of the first or second primary cup contacting member being contactable with an interior surface of a prosthesis cup or prosthesis cup insert at a first depth within the prosthesis cup, and a distal surface of the first or second secondary cup contacting member being contactable with an interior surface of a prosthesis cup or prosthesis cup insert at a second depth within the prosthesis cup, the second depth being distal of the first depth.