A surgical instrument (12) for reducing a rod (20) into a saddle (22) of a fixation member includes a distal end (24) for engaging the saddle and a proximal end (26). A reducing device (28) is disposed between the distal end and the proximal end. The reducing device is operative to reduce the rod into the saddle. The reducing device defines a throughbore. The throughbore provides access there through by a first drive member (152) to secure a plug (61) to the saddle.