Up to 50X life high-performance carbide is welded to the cutting edge for durability and to help prevent tooth loss Stands up to tough demolition applications tall, thick blade profile designed to add durability and minimize blade breaks Engineered for fast performance each tooth is precision ground to cut through wood Lenox 1832144 Reciprocating Saw Blade, 6 Tpi, Carbide Cutting Edge, Bi-Metal