Review on Antrader Bi Metal Cutting Drywall Fiberboard by Matthew Thorndike

Bought this saw to install a recessed light over the shower. Turns out the previous owner had used cement board for the ceiling there. The saw was about halfway through before all the teeth were ground smooth and I finished the hole with a jigsaw (burning out two jigsaw blades). I can't fault this saw because they never said it could cut through cement board. I'll probably buy the same hole saw again when installing recessed lights in a drywall ceiling.