The Lenox Tools 24909T12110R Lenox Lazer Bi-Metal Thick Metal Cutting Reciprocating Saw Blades 12-Inch 10 TPI 2-Pack is designed for cutting through thick gauge metal like angle iron and black pipe. The Patent Pending T2 Tooth Technology delivers up to 2x the life versus the previous model making jobs faster and easier. The Bi-metal Construction stands up to the most demanding applications. The Lazer Balde also features a reinforced tooth design that ensures higher performance in the most demanding jobs. With a wider, thicker body than traditional blades, the Lazer delivers whip free cuts that stay straight and smooth.