These Irwin Jigsaw Wood Cutting Blades, made from carbon steel, are for use on softer materials such as wood, laminated chipboard, and plastics. With a universal shank and 3 Sided, fleam ground teeth for fast cut, and clean finishes in all wood applications. They give fast, clean cuts on hard and soft wood, particle board 6-60 mm (1/4-2 3/8in). Length: 100mm. Pitch 6 Fast Cut. Pack of 5.