LENOX 20488-B414R 4" 14TPI Metal Cutting Reciprocating Saw Blade - 25 Pack Bi-metal construction for durability and long life Power Blast Technology strengthens the blade to reduce breaks Versatile blade cuts easily through thin metals T2 Technology allows efficient cutting in the widest range of materials Bi-metal construction 8% cobalt edge Shatterproof precision-milled teeth High wear resistant