General description Faithfull Bi-Metal Cobalt Hole Saw 79mm is designed for fast, smooth, and aggressive cutting through a wide range of materials. Made from durable bi-metal with 8% cobalt content, these hole saws offer increased heat and wear resistance for a longer lifespan. They are suitable for cutting both thin and thick gauge materials, including stainless steel, steel, aluminum, sheet metal, cast iron, non-ferrous metals, wood, PVC, and plastics. Technical specifications Diameter: 79mm Cutting depth: 38mm Material: Bi-metal with 8% cobalt Part number: FAIHSVP79 Compatibility and accessories Compatible with most variable speed power drills Requires specific arbors depending on hole saw diameter: For 14-30mm diameter, use FAI HSA16030 or FAI HSA1630S For 32-152mm diameter, use FAI HSA32150 or FAI HSA32150S Supplied without arbors Installation Use the appropriate arbor for your hole saw diameter Attach the arbor securely to your drill before mounting the hole saw Usage Ensure the