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