Lenox blades cut through tough materials including nail-embedded wood and retain tough sharpness longer than its competition. Features include: bi-metal construction, 8% cobalt edge, precision-milled teeth which in return make them shatterproof, high wear resistant with a more aggressive cut. For roughing in work and nail embedded wood, fast cutting. Pipe, structural steel, stainless steel and nonferrous metal up to 3/16" and thicker.