These Irwin Jigsaw Wood Cutting Blades are made from carbon steel, and are for use in softer materials such as wood, laminated chipboard, and plastics. With a universal shank and 3 sided, fleam ground teeth for a fast cut, and clean finishes in all wood applications. Straight cuts in hard and soft wood, plastics, plywood, laminated particle board 4-30 mm (3/16 - 1 1/4 in). Length: 100mm. Pitch: 10 Side Ground, Wood Cutting. Pack of 5.