Based on our own experience, this bi-metal hole saw is a must-have for anyone in the industrial and scientific field. It cuts through even the toughest materials with ease and precision, making our projects faster and more efficient.The hardened teeth ensure a longer lifespan, saving us money in the long run. The only downside is that it is a bit pricier compared to other options in the market. Overall, we HIGHLY recommend this product for those in need of a reliable hole saw..See full review