It will cut copper sheet, steel, aluminum, leather, vinyl siding, etc with no problem. Straight or curves are easy. IR makes a good air powered one if you have the compressor option.
If you own a drill or impact gun, the picture doesn't show it but it does have the hex attachment.
I purchased that a year or so ago and use it all the time to cut sheet metal, it cuts thicker metal too and it doesn't cut off a quarter inch piece like electric shears.