Dart HSS Premium Cobalt Bi-Metal Hole Saw offers variable pitched premium 8% cobalt hole saw for professional use. Precision set teeth for aggressive material penetration and swarf clearance. Enhanced heat and wear resistance for greater product life. Will cut thin and thick gauge materials. Suitable for cutting stainless steel, steel, aluminium, sheet metal, metal/mild metal, nonferrous metals, cast iron, hard/soft wood and PVC.