The thing works great. I originally bought this for deburring machined parts, but it's also great for cleaning up drilled holes and saw edges for a great job if you're a welder. The included blades are perfect for aluminum, lexan, other plastics, and mild steel, but I won't cut stainless steel. They will do, but they won't last long and it will take you enough effort to dig out the notch if you're not very careful, so find a set of stainless steel substitutes when you work with them. a lot and just switch as needed.