Unlike other sheet metal cutting drill attachments on the market, this cutter has a gear that distributes the cutting force between the two cutters, which improves the quality of the cut and improves the life of the cutter. The drill attachment is made of high-quality 40Cr steel and aluminum alloy, which has good wear resistance and is extremely strong, so it does not wear easily and has a longer service life. The cutting attachment can easily turn an ordinary electric drill into a metal cutter that will perform its tasks smoothly, you will easily cut thin metal sheets. We have a custom handle that can be used on most power drills. Easy to carry, easy to store when not in use, fits easily in your toolbox. Cutting depth: Iron: 0.2-1mm, White iron 0.3-1mm, Steel: 0.2-0.8mm, Copper: 0.3-1.2mm, Aluminum: 0.3-1.2mm, Stainless steel: 0.2-0.5mm Material: 40Cr steel