A Saw Blade is a tool consisting of a hard blade, wire, or chain with a toothed edge. It is used to cut through relatively hard material, most often wood. The cut is made by placing the toothed edge against the material and moving it forcefully back and forth. This force may be applied by hand, or powered by steam, water, electricity or another power source. An abrasive Saw has a powered circular blade designed to cut through metal.