A differential adjuster that utilizes a tool interface for affecting either a coarse adjustment or a fine adjustment is presented. In accordance with some embodiments of the present invention, a differential adjuster includes an intermediate actuator sleeve with a tool interface to accommodate a tool for performing fine adjustments. In some embodiments, a differential adjuster includes a main body with a tool interface to accept a tool for performing coarse adjustments. By utilizing a tool interface, rather than a knob, embodiments of the differential adjuster according to the present invention can be formed with small form factors.