Make sure to refer to the manufacturer's recommendations, product descriptions, and RPM ratings to select the proper wheel size and bonded abrasive material for your application. Matching the size and RPM rating of the tool to the size and RPM rating of the wheel is critical for safe and effective usage.
The six abrasive categories range from course to super fine and between them include medium, fine, very fine and extra fine. Your choices will depend on the finish you hope to achieve. These particles or categories consist of one of four minerals that make up sandpaper: aluminum oxide, garnet, ceramic (alumina zirconia) and silicon carbide.