Ethan 38534 HSS Metal Cutting T-Shank Jig Saw Blade, 5-Inch by 24TPI, 5-Pack High speed steel (HSS) blades are designed for straight or curved cutting in aluminum, fiberglass, rigid plastic T-style shank to fit saw brands, including Bosch, DeWalt, Hitachi, Makita, Milwaukee, Metabo, Porter Cable, Craftsman For making straight cuts in thin metal, soft metal, pipe. Overall length 5 inches. 24 teeth per inch.