Bosch U118EF 5-Piece 3-1/8 In. 14-18 Progressive TPI Flexible for Metal U-shank Jig Saw Blades,Bosch,U118EF" /> For medium to thin metals 7/32 In. to5/64 In. thick (ferrous and non-ferrous) 14-18 TPI progressive tooth design for smooth cuts in various thicknesses Bi-Metal construction for durability and long life 3-1/8 In. overall length, 2-1/2 In. working length Proper lubricant is recommended when cutting metal U-Shank 5 pack