LENOX 20566-618R 6" 18TPI Metal Cutting Reciprocating Saw Blade - 5 Pack Bi-metal construction for durability and long life Power Blast Technology strengthens the blade to reduce breaks Versatile blade cuts easily through thin and medium metals T2 Technology allows efficient cutting in the widest range of materials Bi-Metal construction Precision milled teeth Shatterproof; shock resistant teeth High heat and wear resistance Increases productivity