This 12 PC. Reciprocating Saw Blade Set contains Bi-Metal blades for durability. There are a variety of sizes for multiple cutting applications. The set comes with a telescoping ToughCase. Kit contains: (3) 6" 6 TPI wood blades, (2) 6" 18 TPI metal blades, (3) 9" 14 TPI metal blades, (3) 9" 6 TPI, (1) 9" 10 TPI fire and rescue/demolition blade, and 1 adjustable plastic blade case.