Quickly cut perfectly round holes in multiple sizes—these kits come with at least six hole saws in different diameters. Their specially designed teeth cut through wood, sheet metal, and other materials faster than the teeth on standard hole saws. Made with high-speed steel teeth and a steel body, they’re often called bimetal hole saws. Unlike drills, these saws make circular cuts without cutting up the material of the core. Use them to cut large holes, such as a cutout in a door for a doorknob. Attach them to a drill or drill press with the included arbors.