Flap Wheel: 1 3/16 in Dia x 1/8 in W, 1/8 in Straight-Shank, Aluminum Oxide, 320 Grit, R369

General purpose mounted flap wheels optimized for use on all metals have a coated aluminum oxide abrasive. Aluminum oxide is a strong, sharp, and durable abrasive that penetrates the work surface and withstands heat and high speeds. Example metals include mild and carbon steel, cast iron, cobalt, titanium, and chrome.