Feature:1. WITH SPRINGS: HSS cutting edges provide impact resistant teeth and tooth stripping resistance. Soft spring form a flexible backing that allows the hole saw to absorb the effects of the job of drilling holes in difficult to cut materials2. LARGE HOLE CUTTING: Of sharpness teeth are ideal for cutting holes in soft metal, wood, PVC board, plastic. Cut , and accurate3. GOOD QUALITY HIGH SPEED STEEL: Made of high speed steel, has the advantages of high hardness, high wear resistance, high heat resistance, etc.4. NON RUST PROCESS: Special heating process is adopted to prolong the service life and prevent rust, useful and reliable5. EASY CHIP EVACUATION: Unique hole design can easily evacuate chips and effectively improve drilling efficiencySpecification:Item Type: Bimetal Hole SawMaterial: High speed steelOpen Hole Size: Approx. 70mm / 2 3/4inOpen Hole Depth: Approx. 32mm / 1.26inHole Saw Height: Approx. 37mm / 1.46inCenter Drill Length: Approx. 97mm / 3.82in Package List:1 x Hole Saw1 x Center DrillNote:1. Please allow tiny size error due to manual measurement. Thanks for your understanding.2. Not recommended for hardwood, hard metal and stone.