Product details:

Scotch-BriteTM SC Surface Conditioning belts work well to remove coarse grindlines, mill marks, or small burrs left by cutting tools or conventional abrasives. Wide belt sanders are for sanding and finishing large wood panels. Silicon carbide is a synthetic mineral that is very sharp and commonly for low-pressure applications such as paint prep and finishing. Aluminum oxide is a hard, blocky mineral that provides high cut-rate and long life. While silicon carbide breaks down faster than aluminum oxide, it produces a finer finish.