Bought a $100 hard compact variable speed router to use with this attachment. Converting a pair of aluminum shop doors for vertical anti-panic bars became a simple process. I used to drill, file, cut with a grinding wheel on a dremel/angle grinder, drill and file some more, etc..It just eats it up. Cuts easily and quickly. I just wish I could find some to cut steel that easily (rather than making thousands of little pieces that get stuck in my fingers)