MUKCHAP 110 mm 4.3 Inch Concrete Hole Saw with 113mm SDS Plus Shank Connecting Rod for Wall, Brick

I didn't expect much from this bit because of the relatively low cost. I didn't expect it to make it through all the layers of brick and stone that I needed to get through, but it performed like a champ. The pictures in the description are true. Highly recommended.

I ordered this hole saw after reading a lot of reviews. The shipping time was decent but that is about the only good thing with this product. I used it to put an exhaust through the exterior brick wall. Took me an hour to get through the 1st layer. I used a big electrical drill, so power was not an issue. It stopped cutting after that. The blades are blunt now. I would not recommend this product if you are using it for brick or concrete.

Not industrial grade or anything. But, for the price it definitely does the job! Cut dryer vent hole through my 50’s double brick house without any issues. Minimal wear to teeth, could cut again

Needed to make a hole in exterior stucco to terminate 4” bathroom exhaust vent. Can’t comment about durability since I only used it one time. But worked fast and easy for the one hole I needed.

It wouldn't cut, many of the teeth are not installed straight and the cutting edge on the teeth are less than 90 degrees. I'm an engineer and I'd like to know how that's supposed to work....