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). Specifications: Length: 100mm.Pitch 6 Fast Cut.Pack of 5.