Product Description For crimping round metal pipe to create a male fitting end. Optimal handle span for maximum power and comfortable operating range. Crimps heavier gauge pipe. From the Manufacturer 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 24 teeth per-inch, measures 6 inches by 3/4-inch by .035, and is intended for work with metal and galvanized pipe 18 gage and under.