by Brusletto. Tough, high quality steel blades made in Norway. Pre-sharpened, require only final honing. Unconditionally guaranteed against breakage for five (5) years. If it breaks, you get a new blade free. A unique 3-layer, laminated construction has ahard inner layer sandwiched between mild layers to provide a keen, durable cutting edge without being brittle. Available in two sizes "Camper" with 3-1/2" blade or Patch Cutter with 2-3/4" blade