Abstract: An abrading tool, abrasive star and abrading kit, in which the abrading kit includes the abrasive star and the abrading tool. The abrading tool includes a threaded drive rod, retaining member for retaining an abrasive material about the threaded drive rod, an expandable support disposed about the threaded drive rod and dimensioned to brace the abrasive material, an expanding member for expanding the expandable support to adjust the diameter of the outer surface of the abrasive material, and an adjusting knob having marls disposed incrementally along its outer surface in positions corresponding to diameters of the expandable support.