Irwin jigsaw blades (5) u118a 10504289HSS: Fully hardened high speed steel for use in metal, aluminum, and no-ferrous metal milled teeth : For longer life and fast cuts in metalFast and even cuts in thin and thick metalersal ShankStraight cuts in metal, non-ferrous metal, aluminium, sheet metal, 1.5-3mm (1/16Inch -1/8″)