This tool has been used and envied by all metals that open wide enough to cut. I've seen one before and used it when we were doing metal roofing but this Malco has the edge for holding and going with my Ryobi 18 volt set but it will fit almost any battery powered drill. I personally haven't found a drill of this type, it doesn't fit as the expansion range is wonderful. I have spare blades but I don't expect to have to use them for another year or two. 2 thumbs up and 5 stars. Cutting capacity is amazing, cuts 18 and 16 ga. Metal with ease and control, just make sure you're tightening in the right places and you can rotate the angle within 1/16" for holes or twists within the metal. The head can easily be adjusted for vertical cutting from the side or any position in between, with bad on the other side, and that's the only downside I've found in a year of use is that it doesn't work in my hammer drill repaired, but then again I have a regular drill, a two speed one cuts perfectly at any speed, I'm used to this tool so I can use it at high speed all the time, but for beginners start slow and these roof rails consumer grade cut easily with a little practice lay the metal flat and lift left side to side as you go over the ridges remember it will leave marks where the stationary blade goes through the metal so cut Take off the bottom or make sure it's a mace that has this line on it.