Disston E0102847 3-Inch Blu-Mol Bi-Metal Jig Saw Blades With Bayonet Shank Metal Cutting, 14 Teeth Per Inch, 76mm, Sold In Tubes, 25 Units/Tube Bi-Metal jig-saw blades are for cutting metals, steel and stainless steel Their high strength steel cutting edges are hardened for long lasting durability Made for heavy duty cutting in wood and metal