Function: 1. HSS hole saw: The hole saw is made of high speed steel, ma high hardness, good wear and heat resistance, adopts special heating process, which prolongs the service life and prevents rusting 2. Sharp cutting edge: high-speed steel cutting edge provides impact-resistant teeth and prevents teeth from peeling, sharp teeth can ensure clean, smooth and very precise cutting 3. Easy chip evacuation: The unique design of the hole allows for easy chip evacuation and improves drilling efficiency 4. Flexible spring: The spring on the durable shank creates a flexible substrate that allows the hole saw to absorb the effects of drilling holes in difficult do cutting materials, making it easier to cut 5. Application: this mandrel hole saw is ideal do cutting holes in soft metal, wood, pcv board, plastic and drywall, not recommended do hardwood, hardwood and stone Specification: Item Type: HSS Hole Saw with Shank Material: stal high-speed Hole size: ok. 80 mm / 3-5/32 inches Hole depth: ok. 32mm / 1.3 inch Saw height: ok. 37mm / 1.5 inch Length of the middle gazebo: ok. 97mm / 3.8in List of packages: 1 x Hole Saw HSS 1 x Centering Drill Bit