Abstract: A modular acetabular impactor and reamer system including a main body extending between a proximal handle end and a distal end. The system also includes a transmission rotatingly extending within the main body. The transmission has an accessory mount. The system also has at least one of an impactor handle and a reamer handle removably coupled to the main body proximal handle end. The impactor handle has a drive shaft to drive rotation relative to the impactor handle. The reamer handle has a drive mount to drive rotation relative to the reamer handle. The system also has at least one of an impactor cup and a reamer module removably coupled to the main body distal end. The transmission and the at least one of the impactor cup and the reamer module correspondingly rotate relative to the main body.