Bosch U118A 5-Piece 3-1/8 In. 17-24P TPI Basic for Metal U-shank Jig Saw Blades For sheet metal 10-16 gauge, thin metals 1/16 In. to 1/8 In. thick (ferrous and non-ferrous) 17-24 TPI progressive tooth design for smooth cuts in various thicknesses High-speed steel construction for maximum life in straight cuts 3-1/8 In. overall length, 2-1/2 In. working length Proper lubricant is recommended when cutting metal