I am just amazed at how well these saws work. Cuts through 1/4" mild steel like butter. The tool holds its edge pretty well if kept cool. You could probably push it harder with the right drill/bit setup, my little magnetic-based drill doesn't have enough horsepower to keep an eye on those bits! If I had one complaint, for stability it would be much better with a 1/2" shank than a 3/8" shank. They don't wobble at all, but a thicker one Shank can help with vibrations I cut holes in steel parts to make them lighter, much cleaner than a torch/plasma For the price these tools are amazing.