Vermont American hole saws are made to meet every need: bi-metal hole saws for heavy-duty cutting in most any machinable material; carbon steel hole saws for cutting wood, plastic, composite materials and soft metal; and a variety of accessories and components. The Bi-Metal Hole Saws contain an extremely durable high speed steel that last up to 5 x longer. For heavy duty cutting in wood, plastics, composite materials and any machinable metal (stainless steel, mild steel, cast iron, copper, brass, aluminum).