The Lenox Tools 20333BT320JC U-Shank Bi-Metal Fine Scrolling Jig Saw Blade 2-3/4-Inch x 3/16-Inch x 20 TPI - 2 Pack is designed for scroll cutting and cutting through laminates. The 20 TPI allow for a smooth, fine finish. The carbon steel construction allows the blades to be super sharp for precision cutting. The teeth are ground to precision sharpness for straight cuts. The Bi-Metal Construction makes the blade more durable and flexible than a traditional Carbon Steel Blade. These blades are made with a Universal Shank that fits most Jig Saws.