Product Description For slicing and cutting metal, wood and plastic. Easily cuts or slots bolts, screws, sheet metal, thin wood and plastic. Trims castings and molded ceramics. Cuts only along its edge. Do not attempt to sand or cut curved holes. Do not run in excess of 30,000 RPM. Use with mandrel. From the Manufacturer A cutting disc made of a hard abrasive with a diameter of 15/16" (23.8 mm) and a width of " ( mm) 36 per package. Ideal for cutting, grooving and trimming all kinds of materials--including metal, wood and ceramics. You can use it to cut screws and rusted bolts, make slots in screw heads, trim castings and more.