The Gator fine 150 grit Emery Cloth is designed for sanding and finishing steel, copper piping, brass, iron, aluminum and stainless steel and can be cut to fit 1/2 sheet, 1/3 sheet, or 1/4 sheet orbital sander. For hand or machine sanding. Cut to fit 1/4 sheet, 1/3 sheet, or 1/2 sheet orbital sanders. Resin-bonded to r