Embodiments of the present invention provide a trial coupler system for use in preparing a patient for an implant. Certain embodiments provide a system including a coupling device (20) and a trial component interface (40) that allows a trial stem (100) to be offset in relation to the respective trial components at an orientation that matches the geometry of the patient. Once the precise positioning is obtained, the trial coupler device (10) can be locked while on the patient's bone so the assembly can be removed without disturbing the desired orientation.