American Saw's Lenox Reciprocating Saw Blades feature bi-metal construction, an 8-percent cobalt edge, precision milled teeth, a too hardness of Rc65-66, and an angled tang. These blades are shatter resistant, with a high wear and heat resistance. Their shock resistant teeth provide a more aggressive cut. This model has 6 teeth per inch, measures 12 inches by 3/4-inch by .050, and is intended for rough work in wood (including nail-embedded wood), fast cutting, and use in remodeling and demolition work.