extends through the stem 46 and the head 42 the trial eccentric head 42 includes an indicia here a notch 44 that indicates a maximum offset position for the eccentric head 42 it should be appreciated that other types of indicia may be used here the notch 44 is located on the edge of the articular surface of the eccentric head 42 referring to fig9 a retaining screw or the like 50 for the trial assembly trial eccentric head and trial broach is shown the retaining screw 50 includes a head 52 having an opening 54 for receiving a screw driver or the like the opening may be hex shape or otherwise extending from the head 52 is a shank 56 terminating in threads 58 the retaining screw 50 is designed to fit into the bore 48 of the trial eccentric head 42 with its threads 58 extending therefrom see fig8 referring to fig1 the trial broach 20 is shown wherein the trial eccentric head 42 is ready to be attached thereto using an appropriate screw driver 66 the eccentric trial head 42 is attached to the trial broach by threading the screw 50 into a complementary threaded bore 64 in the flat 26 once the eccentric head 42 is attached to the trial broach 20 it is inserted into the humerus 36 see fig1 once the trial prosthesis is in place as depicted in fig1 the screw 50 may be loosened to rotate the eccentric head 42 to a proper orientation once a proper rotational orientation has been achieved the screw 50 is tightened the trial prosthesis may now be removed from the humerus 36 once the trial prosthesis has been removed from the humerus 36.