Hitachi 725362 New Progressive Tooth Technology - 8-Inch, Bi-Metal, All Purpose Cutting Reciprocating Saw Blades (5-Pack) 8" x 3/4" x .050" Progressive Bi-Metal Special blade provides universal application in various materials. For wood, wood with nails, non-ferrous metals, plastic, and fiberglass 30 day satisfaction guarantee and one-year limited warranty on parts and labor