Features: 1. HSS Hole Saw: The hole saw is made of high-speed steel, offering high hardness, good wear resistance, and heat resistance. It features a special heat treatment process that extends service life and helps prevent rust. 2. Sharp Cutting Edge: The high-speed steel cutting edge provides impact-resistant teeth and anti-tooth stripping design. The sharp teeth deliver clean, smooth, and highly precise cuts. 3. Efficient Chip Evacuation: The unique hole design allows for easy chip removal, improving drilling efficiency. 4. Flexible Spring Design: The spring on the heavy-duty mandrel provides flexible support, enabling the hole saw to absorb drilling impacts when working with tough or difficult-to-cut materials, making cutting easier. 5. Usage: This mandrel hole saw set is ideal for cutting holes in soft metal, wood, PVC board, plastic, and plasterboard. Not recommended for use on hardwood, hard metal, or stone. Specifications: Item Type: HSS Hole Saw with Mandrel Material: High-Speed Steel Hole Size: Approx. 80mm / 3-5/32in Hole Depth: Approx. 32mm / 1.3in Hole Saw Height: Approx. 37mm / 1.5in Center Arbor Length: Approx. 97mm / 3.8in Package List: 1 x HSS Hole Saw 1 x Center Drill Bit