This Irwin 2087100 is a 5-pack of hook-type utility blades, which are specialized tools distinct from the straight-edge blades you previously listed.

• Design & Function: The "hook" shape is specifically designed to cut materials that would be difficult or dangerous to cut with a straight blade. As you pull the blade through the material, the hooked tip pierces and slices, keeping the material trapped within the hook.

• Best Applications:

  • Roofing Materials: Excellent for cutting asphalt shingles and heavy felt paper.

  • Flooring: Frequently used for linoleum, vinyl, and carpet, where you need to make long, clean cuts without damaging the substrate underneath.

  • Packaging: Ideal for slicing through heavy corrugated cardboard and strapping bands quickly.

• Carbon Steel Construction: While not bi-metal, these high-quality carbon steel blades offer a sharp, consistent cutting edge that is ideal for the specific materials mentioned above.