The Wurth Hole Saw Kit is designed to drill at high speeds, offer a long service life and work on steel, stainless steel, cast iron, brass, aluminum and more. The kit offers fast sawing process with minimal expenditure of force, the company says. The 16-pc kit includes 12 cutters, one extension, one release spring and two arbors, a foam insert with cutouts for each item and a portable carrying case with handle for easy mobility.