Review on 🔪 Bi-Metal Fiberboard with Enhanced Positive Cutting Ability by Daniel Russell

as said is hard work as we have to drill 4 air vents in the outside wall of our house. Halfway through the 1st hole, all of the teeth on this saw were pretty much "used up". No, they are not broken, just used up, as in "no more teeth". We ended up grabbing a couple of Home Depot Milwaukee hole saws to finish the job. The Milwaukee has survived very well but is more expensive. You get what you pay for. They should not be advertised as heavy duty if all of the teeth are aligned halfway through the 1st hole.