This bi-metal hole saw may work for professionals who have industrial-grade machines and experience in drilling large holes.However, based on our own experience it's terrible for DIY projects. We tried to install it on our hand drill, but it just couldn't cope with the material we were cutting, and the result was poor. The pros would be the brand reputation of Bosch for quality products. the cons are that this tool is not a good fit for non-industrial equipment and not very affordable for…