Irwin Jigsaw Wood Cutting Blades made from carbon steel for use in 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. Progressive tooth spacing for straight , accurate cuts in thick and thin wood materials, hard and soft wood, particleboard and plywood 1-80 mm (3/16Inch -3 1/8in).Length: 115mm.Pitch: Progressive. Supplied in a pack of 5.