As an amateur craftsman, I was hesitant to purchase an industrial-grade hole saw .However, after using the Klein Tools 31558 Bi Metal 8 Inch, I'm convinced of its superior performance. As my tests showed, this saw easily cut through thick wood and metal without dulling or overheating. The bi-metal construction ensures durability while the varied tooth design produces clean cuts. The only con I can think of is the higher cost compared to other hole saws, but the quality justifies it. Highly…