I used a jigsaw to cut out 16 gauge for my oil tanks ends as well as my battery tray and other little stuff. I have a Dewalt handheld jigsaw, I would make sure that you have plenty of metal cutting blades on hand in case you chew them up. When I was cuttin out my 5 inch circles for my oil tank the biggest pain in the butt was keeping the piece real close to an edge as I cut because it would start to bounce like mad and get unruly If I didn't.