As an industrial and scientific user, i can confidently say that this hole saw is top-notch! It cuts through hardened material with ease and precision, and the size is perfect for larger holes. As a result of using this product, I found that my cutting time was significantly reduced. However the only downside is that it can be a bit pricey compared to other hole saws on the market. Overall, I highly recommend this tool if you`re in need of a durable and reliable hole cutting accessory for your cutting tools....