General purpose unmounted 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.

Blending and finishing flap drums for all metals install on power burnishers and are made of nonwoven aluminum oxide abrasive. Blending and finishing abrasives remove fine lines and scratches and smooth surfaces to prepare surfaces for final finishing. Silicon carbide is a sharp synthetic abrasive that provides a fine finish in low-pressure applications such as finishing and painting preparation. It breaks down faster than aluminum oxide. Example metals include mild and carbon steel, cast iron, cobalt, titanium, and chrome.