Features and Benefits: Bi-metal construction allows blades to bend and flex without breaking High heat and water resistance Shatterproof shock resistant precision milled teeth 6 teeth per inch Blade is ideal for cutting thickest metals general demolition wood plaster drywall plastic and composites LENOX Tools Bi-Metal Reciprocating Saw Blade 9-inch 6 TPI 50-Pack (22752OSB956R). T2 technology tooth design cuts heavy materials more easily. Bi-metal construction allows blades to bend and flex without breaking. Designed to minimize friction and build-up while cutting through the widest variety of metal materials. 6 tooth per inch blades are best for use with thickest metals general demolition wood plaster drywall plastic and composites.