An orthopedic prosthetic impactor used for the implantation of double mobility cup implants is described. The impactor consists of a drive train, a C-shaped housing, and a prosthetic cup engaging subassembly. The subassembly comprises an impaction plate, a primary cup contacting member, a secondary cup contacting member and a wedging assembly. The primary and secondary cup contacting members, contactable with an interior surface of the prosthetic cup implant. When activated by the drive train, the wedging assembly moves in a proximal direction towards the impaction plate, positioning the wedging assembly in a contactable relationship with the primary and secondary members thereby preventing the members and a connected prosthetic implant cup from moving during implantation.
