BHA Flap Wheel Sanding Drum, 4.5" x 4" with 3/4" Quad Keyway (60 Grit). 4.5” x 4” x 3/4” quad key shaft Flap Wheel Abrasive Drums by BHA - Black Hawk Abrasives are designed to debur, grind, blend, or removal flash, scale or rust on large surface areas.
eBay