Cut perfectly round holes in a variety of diameters. With variable-set teeth, the saws make quick cuts through wood, sheet metal, and other materials with minimal vibration. Also known as bimetal hole saws, they have high-speed steel teeth and a steel body. Often used to remove more material than drill bits, these saws are helpful for jobs such as creating cutouts for doorknobs or cables. Attach them to a drill or drill press with the included arbors.