BLADE 1 - HCS 33M WOOD & PLASTIC BLADE 2- BI METAL 33MM METAL & WOOD BLADE 3 - HCS 65MM WOOD & PLASTIC Your tools should last for years, and you can be sure these Ohuhu Oscillating Saw Blades will. Designed with the toughest of premium alloy steel and high carbon steel, you can cut through nearly any material, from wood, soft metals(Iron sheet, aluminum alloy,ect), plastics, hardwoods, drywall, fiberglass, acrylics and laminates Precision Cutting Performance: Get the right cut the first time around. Since every saw blade comes with measurements on both sides of the blade (in inches and millimeters) and a longer wavy tooth, you'll always get the best results.