Dynabrade 13501 Dynastraight Finishing Tool Dynastraight Air-Powered Abrasive Finishing Tool for graining, cleaning and polishing on stainless steel, aluminum, carbon steel and composites 1,800 RPM, 1 hp model includes 13071 Combo Arbor, for up to 3" wide wheels with 5/8" or 1" diameter center hole Any Dynacushion pneumatic wheel with 5/8" dia. bore may be mounted