Air Flange Tool

I am working on some sheet metal for a custom car. I am at a point where I need to attach two pieces of body work together with some bolts. I am considering using a drill with a metal bit on it to bore out the holes where I have marked them. However, when I tried this process on a test piece of metal, the bit just slides off the mark and scratches the sheet metal. Is there a better air tool out there for punching holes for my bolts?

The air tool that I would recommend for your project is an air flange tool. This air tool is designed to easily punch a hole in metal up to 5/16 inches thick. The great thing about using an air flange tool is that the tool won't slide off the mark. It will punch the hole right where you put it. You can also use this tool for fasteneing pieces of metal together as well.