or requires a giant vertical end mill or drill press. I put it in my 18 volt hand drill (ambidextrous) and continued drilling through the roughest 1/16 inch honeycomb perforated stainless steel, just waiting for this thing to grab my wrist and rip it off. To my absolute surprise, it drilled the most perfect circles that I could not have made with any other tool and was extremely easy to manipulate with hand tools. No chipped teeth, no sparks, it didn't even get hot, I was very impressed