HSS Hole Saw with Mandrel 80mm Cutting Sharp Teeth Hole Drilling Cutter for Soft Metal Wood. The hole saw is made of high-speed steel, offering high hardness, good wear resistance, and heat resistance. A special heat treatment process extends service life and helps prevent rust. The high-speed steel cutting edge provides impact-resistant teeth and anti-tooth stripping properties. The sharp teeth deliver clean, smooth, and highly precise cuts. The unique hole design allows for efficient chip removal, improving drilling performance and efficiency. The spring on the heavy-duty mandrel provides flexible support, enabling the hole saw to absorb drilling impacts when working with tough materials, making cutting easier. This mandrel hole saw is suitable for cutting holes in soft metal, wood, PVC board, plastic, and plasterboard. It is not recommended for use on hardwood, hard metal, or stone.