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 in all wood applications. Fast straight cuts in hard and soft wood, plastics, particleboard 6-60 mm (1/4 - 2 3/8in). Length: 100mm. Pitch 6 , Side Ground, Wood Cutting. Supplied in a pack of 5.