As a regular user in the Industrial and Scientific field I was disappointed with this product`s quality .As a result of my tests, I determined that this Hole Saw fails to deliver clean cuts on thicker materials such as marble and granite. On the plus side, the tool comes with a long lifespan. However, the cons outweigh the pros as the rough finish on the cut material requires extra finishing work. In conclusion, I would not recommend this product for cutting thicker materials..