Review on Antrader Bi Metal Cutting Drywall Fiberboard by Marc Hawkins

I used this to install a 6 inch vent above the stove through the cabinets and the outside wall of the house. He did the job including drilling the siding, drywall, and wood cabinets. I don't think the blade is high quality meaning it dulls quickly but for the 4 or 5 holes I had to drill it did the job. Be careful - with a heavy drill you can easily dislocate your wrist with this heavy hole saw.