What Is Included:* hole saw, arbor (with drill bit), hex wrenchApplications & Features:--- Suitable for Copper, Aluminum, Mild Steel, PVC Board, Acrylic Board, Hardwood, Plastic, Cork--- 4241 delivers exceptional hot hardness. Its optimized alloy composition ensures superior wear resistance and enhanced toughness, reducing structural integrity concerns in high-stress operations. Excellent grindability facilitates precision machining of complex complex tool designs (drills, taps, milling cutters), lowering manufacturing costs and extending tool lifeUseful Tips:--- Do not touch the hole saw immediately after drilling because the temperature is too high. Add coolant or water when drilling metal. If Wear gloves and masks as needed and keep drilling slowly as the center drill passes through the material. If the hole saw encounters unusual resistance or vibration during operation, stop drilling immediately.