Disston E0102318 3-1/8-Inch Blu-Mol High Speed Steel Jig Saw Blades With Universal Shank, Metal Cutting, 24 Teeth Per Inch, 79mm, Sold In Cards, 2 Units/Card 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