Materials, tooth configuration and heat treating are designed to maximize performance in specific cutting applications. Durable, long life blades. Blade has a 1/2 in universal tang that fits all Sawzalls and standard competitive saws. For cutting hardwood floor, cast iron, stainless steel, fiberglass materials, (Polyesters, Epoxies, Melamine's), ceramic tile, stone, slate, clay pipe, carbon, brick, plaster, marble, & chalkboard.