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 SAWZALL®s 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 and chalkboard.