Abstract: The invention of this patent is an adjustable rotary tool counter balanced system. The invention provides for balancing weights that are mounted to a cutting tool body to provide a means to compensate for a rotational balance error induced by the variable positioning of a cutting tool. The invention allows a user to adjust the cutting tool within the cutting tool body, so as to maximize tool efficiency. The user can also balance the rotational mass about the axial center line of the cutter tool body, by means of the balancing weights, thus eliminating vibration caused by an unbalanced rotating cutting tool.