If you do any amount of cutting materials like corrugated steel or plastic roofing, various sheet metal-duct work, I have come across a tool that will really make life a lot easier. The Dewalt Shear Attachment, it will go on just about any drill or impact driver and it makes working with and cutting sheet materials so much more pleasant and easy. I tried it out on my Milwaukee impact driver and man it is slick, it is going to be a big work saver for me.
Al