3M Utility cloth roll, 1-1/2in w x 50 yd, Aluminum oxide, 120 grit the desired length of the strip can be torn from the roll for a specific application. Our aluminum oxide abrasive can be used on ferrous and non-ferrous metals, wood, And plastic. The light j-weight cloth backing proides the flexibility needed to conform to circular edges, Angles, or other contours. It remains durable even when bent or rolled, without tearing or shelling. On the other hand, our cloth can be torn by hand when a smaller piece is needed, without comproising the sanding surface.aluminum oxide is a popular choice among industrial proessionals because of its fast cut-rate and long life. This mineral makes a tough, Durable abrasive that self-fractures to expose fresh cutting edges, whereas traditional natural abrasives dull more quickly. Due to its fast cut-rate, Hardness, And strength, It is widely used in grinding applications in addition to sanding and finishing applications. Aluminum oxide is suitable for a wide variety of materials in both woodworking and metalworking, Including ferrous alloys.the sanding surface is closed-coat, meaning that the abrasive mineral covers 100% of the sanding surface, For maximum cutting efficiency. application: cleaning, Contour finishing, Deburring, rust removal