Irwin Jigsaw Metal Cutting Blades have fully hardened high speed steel for use in metal, aluminum, and no-ferrous metal. HSS milled teeth provide longer life and fast cuts in metal.Fast and even cuts in thin and thick metal. T Shank for AEG, Bosch, DEWALT and Hitachi Jigsaws. Progressive tooth spacing, for fast cuts, long life, in sheet metal 2-10mm, non-ferrous metal 2-20mm, stainless steel 1.5-3mm, plastic 1.5-30mm, fiberglass 1-20mm.Length: 132mm.Pitch: 24. Supplied in a pack of 5.