Abstract: An apparatus for polishing a metal article, including a tapered mandrel adapted to be connected to a power source. The tapered mandrel is received within the tapered interior of an expandable hub that is provided with a plurality of longitudinally extending slots. One group of slots extends from one end of the hub and terminates short of the opposite end of the hub, while a second group of slots is spaced between the first slots and extend from the second end of the hub and terminate short of the first end. A series of outwardly projecting longitudinal ribs are located between adjacent slots. The hub is positioned within a resilient sleeve having a plurality of internal longitudinal grooves to receive the ribs, and the outer surface of the sleeve receives an abrasive band. By threading a stud in the outer end of the mandrel, the tapered mandrel is drawn inwardly of the hub to expand the hub and firmly secure the abrasive band to the sleeve.