I love to make holes in tin, but the drill takes too long. I just discovered a new tool (at least to me) from Eurotools which punches square holes and oval holes. Sources seem to be quickly running out of them so they must be popular at the moment. I ordered it through a supplier on Etsy since Wired Up Beads was already out of them.
Speaking of Wired Up the Wubbers are the best pliers I have ever had. Wired Up really stands behind their products also. I had the little metal piece that keeps the pliers open break and they sent me a new pair of pliers and asked me to return the old ones. This was exceptional given I had used the other pliers for a year. So if you are looking for some pliers that can stand the strain of large gauge wire I say get Wubbers. I now have them in all sizes and prefer them to my Lindstrom pliers that cost twice as much.