The flexibility of the cloth in combination with the wide grit range, from coarse to fine, provides an excellent tool for a variety of applications including deburring, rust removal & finishing metal.. Our emery cloth rolls are made of aluminum oxide with nylon fabric on the back marked with grit number, it is wear-resistant and anti-stretch.. 320. designed for manual sanding applications. The abrasive sandpaper rolls are suitable for fine grinding and polishing of metal, aluminum copper, hardwood, synthetic materials, etc