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). Specifications: Length: 100mm.Pitch: 10 Side Ground, Wood Cutting.Pack of 5.  Additional Information:• Type: Wood• Shank: U• Pack Qty.: 5• Tooth Pitch (TPI): 10• Working Length (mm): 82• Popular Reference: U101BP